PUMA publications for /tag/dynamichttps://puma.ub.uni-stuttgart.de/tag/dynamicPUMA RSS feed for /tag/dynamic2024-03-28T20:59:09+01:00Detection and Identification of Nonlinear Contact Dynamics at Workpiece Clamping Positionshttps://puma.ub.uni-stuttgart.de/bibtex/29f69bf20f66e5ec5463de2d42693b343/walthermaierwalthermaier2023-07-27T11:34:01+02:00clamping contact dynamic ifw myown test <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Qi Feng" itemprop="url" href="/person/10e984c0a44609d50fe981e5cbaf89eea/author/0"><span itemprop="name">Q. Feng</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Walther Maier" itemprop="url" href="/person/10e984c0a44609d50fe981e5cbaf89eea/author/1"><span itemprop="name">W. Maier</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Steffen Braun" itemprop="url" href="/person/10e984c0a44609d50fe981e5cbaf89eea/author/2"><span itemprop="name">S. Braun</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Hans-Christian Möhring" itemprop="url" href="/person/10e984c0a44609d50fe981e5cbaf89eea/author/3"><span itemprop="name">H. Möhring</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="journal">Journal of machine engineering</span>, </em> <em><span itemtype="http://schema.org/PublicationVolume" itemscope="itemscope" itemprop="isPartOf"><span itemprop="volumeNumber">1 </span></span>(<span itemprop="issueNumber">23</span>):
<span itemprop="pagination">114-122</span></em> </span>(<em><span>March 2023<meta content="March 2023" itemprop="datePublished"/></span></em>)</span>Thu Jul 27 11:34:01 CEST 2023Journal of machine engineering323114-122Detection and Identification of Nonlinear Contact Dynamics at Workpiece Clamping Positions12023clamping contact dynamic ifw myown test Dynamic modeling of the workpiece-fixture contact behavior for intelligent fixture designhttps://puma.ub.uni-stuttgart.de/bibtex/2ce6101e10f264b7362012fb7d183e09c/walthermaierwalthermaier2023-07-27T11:15:48+02:00contact design dynamic fixture ifw modeling myown test <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Qi Feng" itemprop="url" href="/person/1b1567bce9383f113be59b436951d63f9/author/0"><span itemprop="name">Q. Feng</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Walther Maier" itemprop="url" href="/person/1b1567bce9383f113be59b436951d63f9/author/1"><span itemprop="name">W. Maier</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Steffen Braun" itemprop="url" href="/person/1b1567bce9383f113be59b436951d63f9/author/2"><span itemprop="name">S. Braun</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Hans-Christian Möhring" itemprop="url" href="/person/1b1567bce9383f113be59b436951d63f9/author/3"><span itemprop="name">H. Möhring</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="journal">Procedia CIRP</span>, </em> <em><span itemtype="http://schema.org/PublicationVolume" itemscope="itemscope" itemprop="isPartOf"><span itemprop="volumeNumber">119 </span></span>(<span itemprop="issueNumber">119</span>):
<span itemprop="pagination">58-65</span></em> </span>(<em><span>July 2023<meta content="July 2023" itemprop="datePublished"/></span></em>)</span>Thu Jul 27 11:15:48 CEST 2023Procedia CIRP711958-65Dynamic modeling of the workpiece-fixture contact behavior for intelligent fixture design1192023contact design dynamic fixture ifw modeling myown test Optimal Medium Voltage Grid Planning under Consideration of Dynamic Current Ratings of Underground Cables and E-Mobilityhttps://puma.ub.uni-stuttgart.de/bibtex/2100b461f403038be7c6d3427dbdac816/annettegugelannettegugel2023-01-30T14:23:22+01:00Cables Consideration Current Dynamic E-Mobility Grid Medium Optimal Planning Ratings Underground Voltage and of under <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Markus Miller" itemprop="url" href="/person/1ffaca18d84c0ec6f742230c63c2a5ab1/author/0"><span itemprop="name">M. Miller</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Paul Burkhardt" itemprop="url" href="/person/1ffaca18d84c0ec6f742230c63c2a5ab1/author/1"><span itemprop="name">P. Burkhardt</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Krzysztof Rudion" itemprop="url" href="/person/1ffaca18d84c0ec6f742230c63c2a5ab1/author/2"><span itemprop="name">K. Rudion</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="H. Nägele" itemprop="url" href="/person/1ffaca18d84c0ec6f742230c63c2a5ab1/author/3"><span itemprop="name">H. Nägele</span></a></span></span>. </span><span class="additional-entrytype-information">(<em><span>November 2022<meta content="November 2022" itemprop="datePublished"/></span></em>)</span>Mon Jan 30 14:23:22 CET 202311Optimal Medium Voltage Grid Planning under Consideration of Dynamic Current Ratings of Underground Cables and E-Mobility2022Cables Consideration Current Dynamic E-Mobility Grid Medium Optimal Planning Ratings Underground Voltage and of under Effect of Static Stretching, Dynamic Stretching, and Myofascial Foam Rolling on Range of Motion During Hip Flexion: A Randomized Crossover Trialhttps://puma.ub.uni-stuttgart.de/bibtex/220aac70d92fb99729b91ffe1c3adb342/inspo5inspo52022-07-19T11:10:29+02:00Dynamic Motion Myofascial Range Static Stretching of <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Tobias Siebert" itemprop="url" href="/person/1998f4bb115946256f369303b1f4fc79c/author/0"><span itemprop="name">T. Siebert</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Lars Donath" itemprop="url" href="/person/1998f4bb115946256f369303b1f4fc79c/author/1"><span itemprop="name">L. Donath</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Mischa Borsdorf" itemprop="url" href="/person/1998f4bb115946256f369303b1f4fc79c/author/2"><span itemprop="name">M. Borsdorf</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Norman Stutzig" itemprop="url" href="/person/1998f4bb115946256f369303b1f4fc79c/author/3"><span itemprop="name">N. Stutzig</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="journal">Journal of Strength and Conditioning Research</span>, </em> <em><span itemtype="http://schema.org/PublicationVolume" itemscope="itemscope" itemprop="isPartOf"><span itemprop="volumeNumber">36 </span></span>(<span itemprop="issueNumber">3</span>):
<span itemprop="pagination">680--685</span></em> </span>(<em><span>February 2022<meta content="February 2022" itemprop="datePublished"/></span></em>)</span>Tue Jul 19 11:10:29 CEST 2022Journal of Strength and Conditioning Researchfeb3680--685Effect of Static Stretching, Dynamic Stretching, and Myofascial Foam Rolling on Range of Motion During Hip Flexion: A Randomized Crossover Trial362022Dynamic Motion Myofascial Range Static Stretching of Longitudinal sequencing in intramuscular coordination: A new hypothesis of dynamic functions in the human rectus femoris musclehttps://puma.ub.uni-stuttgart.de/bibtex/2fd36e7e13c488bf8e769fe41bed60dc3/inspo5inspo52022-07-19T11:10:29+02:00Longitudinal dynamic femoris functions human intramuscular muscle rectus sequencing <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Christoph von Laßberg" itemprop="url" href="/person/19c585a2d480703d099c25ec697d427ed/author/0"><span itemprop="name">C. von Laßberg</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Julia A. Schneid" itemprop="url" href="/person/19c585a2d480703d099c25ec697d427ed/author/1"><span itemprop="name">J. Schneid</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Dominik Graf" itemprop="url" href="/person/19c585a2d480703d099c25ec697d427ed/author/2"><span itemprop="name">D. Graf</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Felix Finger" itemprop="url" href="/person/19c585a2d480703d099c25ec697d427ed/author/3"><span itemprop="name">F. Finger</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Walter Rapp" itemprop="url" href="/person/19c585a2d480703d099c25ec697d427ed/author/4"><span itemprop="name">W. Rapp</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Norman Stutzig" itemprop="url" href="/person/19c585a2d480703d099c25ec697d427ed/author/5"><span itemprop="name">N. Stutzig</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="journal">PLOS ONE</span>, </em> <em><span itemtype="http://schema.org/PublicationVolume" itemscope="itemscope" itemprop="isPartOf"><span itemprop="volumeNumber">12 </span></span>(<span itemprop="issueNumber">8</span>):
<span itemprop="pagination">1-23</span></em> </span>(<em><span>August 2017<meta content="August 2017" itemprop="datePublished"/></span></em>)</span>Tue Jul 19 11:10:29 CEST 2022PLOS ONE0881-23Longitudinal sequencing in intramuscular coordination: A new hypothesis of dynamic functions in the human rectus femoris muscle122017Longitudinal dynamic femoris functions human intramuscular muscle rectus sequencing The punctum fixum-punctum mobile model has been introduced in previous publications. It describes general principles of intersegmental neuromuscular succession patterns to most efficiently generate specific movement intentions. The general hypothesis of this study is that these principles—if they really do indicate a fundamental basis for efficient movement generation—should also be found in intramuscular coordination and should be indicated by “longitudinal sequencing” between fibers according to the principles of the punctum fixum-punctum mobile model. Based on this general hypothesis an operationalized model was developed for the rectus femoris muscle (RF), to exemplarily scrutinize this hypothesis for the RF. Electromyography was performed for 14 healthy male participants by using two intramuscular fine wire electrodes in the RF (placed proximal and distal), three surface electrodes over the RF (placed proximal, middle, and distal), and two surface electrodes over the antagonists (m. biceps femoris and m. semitendinosus). Three movement tasks were measured: kicking movements; deceleration after sprints; and passively induced backward accelerations of the leg. The results suggest that proximal fibers can be activated independently from distal fibers within the RF. Further, it was shown that the hypothesized function of “intramuscular longitudinal sequencing” does exist during dynamic movements. According to the punctum fixum-punctum mobile model, the activation succession between fibers changes direction (from proximal to distal or inversely) depending on the intentional context. Thus, the results seem to support the general hypothesis for the RF and could be principally in line with the operationalized “inter-fiber to tendon interaction model”.A finite-volume moving-mesh method for two-phase flow in
fracturing porous mediahttps://puma.ub.uni-stuttgart.de/bibtex/208be7563b587190c24a78304dab29287/mathematikmathematik2022-02-23T10:11:48+01:00Discrete Dynamic Finite Fracture Moving-mesh Two-phase algorithm am aperture flow fracture from:brittalenz ians in matrix media methods models porous propagation volume <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Samuel Burbulla" itemprop="url" href="/person/11ef19dc47df248ebcee76f8655d00172/author/0"><span itemprop="name">S. Burbulla</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Christian Rohde" itemprop="url" href="/person/11ef19dc47df248ebcee76f8655d00172/author/1"><span itemprop="name">C. Rohde</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="journal">J. Comput. Phys.</span>, </em> </span>(<em><span>2022<meta content="2022" itemprop="datePublished"/></span></em>)</span>Wed Feb 23 10:11:48 CET 2022J. Comput. Phys.111031A finite-volume moving-mesh method for two-phase flow in
fracturing porous media2022Discrete Dynamic Finite Fracture Moving-mesh Two-phase algorithm am aperture flow fracture from:brittalenz ians in matrix media methods models porous propagation volume Multiphase flow in fractured porous media can be described
by discrete fracture matrix models that represent the fractures as
dimensionally reduced manifolds embedded in the bulk porous medium.
Generalizing earlier work on this approach we focus on immiscible
two-phase flow in time-dependent fracture geometries, i.e., the fracture
itself and the aperture of the fractures might evolve in time. For
dynamic fracture geometries of that kind, neglecting capillary forces,
we deduce by transversal averaging of a full dimensional description a
dimensionally reduced model that governs the geometric evolution and the
flow dynamics. The core computational contribution is a
mixed-dimensional finite-volume discretization based on a conforming
moving-mesh ansatz. This finite-volume moving-mesh (FVMM) algorithm is
tracking the fractures' motions as a family of unions of facets of the
mesh. Notably, the method permits arbitrary movement of facets of the
triangulation while keeping the mass conservation constraint. In a
series of numerical examples we investigate the modeling error of the
reduced model as it compares to the original full dimensional model.
Moreover, we show the performance of the finite-volume moving-mesh
algorithm for the complex wave pattern that is induced by the
interaction of saturation fronts and evolving fractures.Optimized Planning of Distribution Grids Considering Grid Expansion, Battery Systems and Dynamic Curtailment.https://puma.ub.uni-stuttgart.de/bibtex/22c5f3a3937a442d857971d238e55903c/annettegugelannettegugel2022-02-14T14:24:46+01:00Battery Considering Curtailment. Distribution Dynamic Expansion, Grid Grids Optimized Planning Systems and of <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Ouafa Laribi" itemprop="url" href="/person/17c6e3d68a7b31dd39108663b4fa298d3/author/0"><span itemprop="name">O. Laribi</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Krzysztof Rudion" itemprop="url" href="/person/17c6e3d68a7b31dd39108663b4fa298d3/author/1"><span itemprop="name">K. Rudion</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="journal">Energies 2021</span>, </em> </span>(<em><span>August 2021<meta content="August 2021" itemprop="datePublished"/></span></em>)</span>Mon Feb 14 14:24:46 CET 2022Energies 202185242Optimized Planning of Distribution Grids Considering Grid Expansion, Battery Systems and Dynamic Curtailment.142021Battery Considering Curtailment. Distribution Dynamic Expansion, Grid Grids Optimized Planning Systems and of Robust output-feedback controller design via local BMI optimizationhttps://puma.ub.uni-stuttgart.de/bibtex/250eb44f91950357cf988eb9394027e14/carsten.scherercarsten.scherer2021-12-07T20:40:52+01:00algorithms bilinear control design dynamic feasibility formulas global h-2 h-infinity imng inequalities linear-systems lmis matrix multiobjective optimization order output-feedback parameter peerReviewed robust structured synthesis uncertainty <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="S. Kanev" itemprop="url" href="/person/179b43995f394ecc9dbf6ddc0aa390ca5/author/0"><span itemprop="name">S. Kanev</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="C. W. Scherer" itemprop="url" href="/person/179b43995f394ecc9dbf6ddc0aa390ca5/author/1"><span itemprop="name">C. Scherer</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="M. Verhaegen" itemprop="url" href="/person/179b43995f394ecc9dbf6ddc0aa390ca5/author/2"><span itemprop="name">M. Verhaegen</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="B. De Schutter" itemprop="url" href="/person/179b43995f394ecc9dbf6ddc0aa390ca5/author/3"><span itemprop="name">B. De Schutter</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="journal">Automatica</span>, </em> <em><span itemtype="http://schema.org/PublicationVolume" itemscope="itemscope" itemprop="isPartOf"><span itemprop="volumeNumber">40 </span></span>(<span itemprop="issueNumber">7</span>):
<span itemprop="pagination">1115-1127</span></em> </span>(<em><span>July 2004<meta content="July 2004" itemprop="datePublished"/></span></em>)</span>Tue Dec 07 20:40:52 CET 2021Automaticajul71115-1127{R}obust output-feedback controller design via local {BMI} optimization402004algorithms bilinear control design dynamic feasibility formulas global h-2 h-infinity imng inequalities linear-systems lmis matrix multiobjective optimization order output-feedback parameter peerReviewed robust structured synthesis uncertainty The problem of designing a globally optimal full-order output-feedback controller for polytopic uncertain systems is known to be a non-convex NP-hard optimization problem, that can be represented as a bilinear matrix inequality optimization problem for most design objectives. In this paper a new approach is proposed to the design of locally optimal controllers. It is iterative by nature, and starting from any initial feasible controller it performs local optimization over a suitably defined non-convex function at each iteration. The approach features the properties of computational efficiency, guaranteed convergence to a local optimum, and applicability to a very wide range of problems. Furthermore, a fast (but conservative) LMI-based procedure for computing an initially feasible controller is also presented. The complete approach is demonstrated on a model of one joint of a real-life space robotic manipulator. (C) 2004 Elsevier Ltd. All rights reserved.Robust output-feedback controller design via local BMI optimizationhttps://puma.ub.uni-stuttgart.de/bibtex/250eb44f91950357cf988eb9394027e14/mathematikmathematik2021-12-01T21:53:35+01:00robust multiobjective synthesis control imng feasibility bilinear h-infinity inequalities algorithms formulas linear-systems global h-2 matrix uncertainty output-feedback from:carsten.scherer design optimization parameter peerReviewed lmis structured dynamic order <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="S. Kanev" itemprop="url" href="/person/179b43995f394ecc9dbf6ddc0aa390ca5/author/0"><span itemprop="name">S. Kanev</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="C. W. Scherer" itemprop="url" href="/person/179b43995f394ecc9dbf6ddc0aa390ca5/author/1"><span itemprop="name">C. Scherer</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="M. Verhaegen" itemprop="url" href="/person/179b43995f394ecc9dbf6ddc0aa390ca5/author/2"><span itemprop="name">M. Verhaegen</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="B. De Schutter" itemprop="url" href="/person/179b43995f394ecc9dbf6ddc0aa390ca5/author/3"><span itemprop="name">B. De Schutter</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="journal">Automatica</span>, </em> <em><span itemtype="http://schema.org/PublicationVolume" itemscope="itemscope" itemprop="isPartOf"><span itemprop="volumeNumber">40 </span></span>(<span itemprop="issueNumber">7</span>):
<span itemprop="pagination">1115-1127</span></em> </span>(<em><span>July 2004<meta content="July 2004" itemprop="datePublished"/></span></em>)</span>Wed Dec 01 21:53:35 CET 2021Automaticajul71115-1127{R}obust output-feedback controller design via local {BMI} optimization402004robust multiobjective synthesis control imng feasibility bilinear h-infinity inequalities algorithms formulas linear-systems global h-2 matrix uncertainty output-feedback from:carsten.scherer design optimization parameter peerReviewed lmis structured dynamic order The problem of designing a globally optimal full-order output-feedback controller for polytopic uncertain systems is known to be a non-convex NP-hard optimization problem, that can be represented as a bilinear matrix inequality optimization problem for most design objectives. In this paper a new approach is proposed to the design of locally optimal controllers. It is iterative by nature, and starting from any initial feasible controller it performs local optimization over a suitably defined non-convex function at each iteration. The approach features the properties of computational efficiency, guaranteed convergence to a local optimum, and applicability to a very wide range of problems. Furthermore, a fast (but conservative) LMI-based procedure for computing an initially feasible controller is also presented. The complete approach is demonstrated on a model of one joint of a real-life space robotic manipulator. (C) 2004 Elsevier Ltd. All rights reserved.Robustness with dynamic IQCs: An exact state-space characterization of nominal stability with applications to robust estimationhttps://puma.ub.uni-stuttgart.de/bibtex/239a150ee0ab5e761fd6184ef2651cf0b/mathematikmathematik2021-12-01T20:49:49+01:00LMI-based Dynamic Robust synthesis imng estimation from:carsten.scherer EXC310 pn4 peerReviewed multipliers IQC Guaranteed stability <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Carsten W. Scherer" itemprop="url" href="/person/11316de0248f51ff019d5c6dd465f3a48/author/0"><span itemprop="name">C. Scherer</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="I. Emre Köse" itemprop="url" href="/person/11316de0248f51ff019d5c6dd465f3a48/author/1"><span itemprop="name">I. Köse</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="journal">Automatica</span>, </em> <em><span itemtype="http://schema.org/PublicationVolume" itemscope="itemscope" itemprop="isPartOf"><span itemprop="volumeNumber">44 </span></span>(<span itemprop="issueNumber">7</span>):
<span itemprop="pagination">1666-1675</span></em> </span>(<em><span>2008/7 2008<meta content="2008/7 2008" itemprop="datePublished"/></span></em>)</span>Wed Dec 01 20:49:49 CET 2021Automatica2008/771666-1675{R}obustness with dynamic {IQC}s: {A}n exact state-space characterization of nominal stability with applications to robust estimation442008LMI-based Dynamic Robust synthesis imng estimation from:carsten.scherer EXC310 pn4 peerReviewed multipliers IQC Guaranteed stability Humidity and thermal triggered Shape Memory Effect - Rheology-based numerical modelling - Dynamic Mechanical Thermal Humidity Analysishttps://puma.ub.uni-stuttgart.de/bibtex/27d09ebbf20fa448aad7db0500d611535/dominikfauserdominikfauser2021-10-13T14:12:55+02:00Analysis Dynamic Humidity Mechanical Thermal mydata myown <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Dominik Fauser" itemprop="url" href="/person/1016821b6323c55ae4ff8ee0beb138778/author/0"><span itemprop="name">D. Fauser</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Holger Steeb" itemprop="url" href="/person/1016821b6323c55ae4ff8ee0beb138778/author/1"><span itemprop="name">H. Steeb</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"> </span>(<em><span>2021<meta content="2021" itemprop="datePublished"/></span></em>)</span>Wed Oct 13 14:12:55 CEST 2021{Humidity and thermal triggered Shape Memory Effect - Rheology-based numerical modelling - Dynamic Mechanical Thermal Humidity Analysis}2021Analysis Dynamic Humidity Mechanical Thermal mydata myown Data-driven surrogates of value functions and applications to feedback control for dynamical systemshttps://puma.ub.uni-stuttgart.de/bibtex/2170332c3f0ced359dd0fcfb339ab061b/mathematikmathematik2021-09-29T14:35:10+02:00Kernel anm approximation, control, dynamic feedback from:britsteiner greedy ians optimal principle, programming techniques <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="A. Schmidt" itemprop="url" href="/person/14bfa5b3c1d35696d5b7b3d202217e601/author/0"><span itemprop="name">A. Schmidt</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Bernard Haasdonk" itemprop="url" href="/person/14bfa5b3c1d35696d5b7b3d202217e601/author/1"><span itemprop="name">B. Haasdonk</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="journal">IFAC-PapersOnLine</span>, </em> <em><span itemtype="http://schema.org/PublicationVolume" itemscope="itemscope" itemprop="isPartOf"><span itemprop="volumeNumber">51 </span></span>(<span itemprop="issueNumber">2</span>):
<span itemprop="pagination">307--312</span></em> </span>(<em><span>2018<meta content="2018" itemprop="datePublished"/></span></em>)<em>9th Vienna International Conference on Mathematical Modelling.</em></span>Wed Sep 29 14:35:10 CEST 2021IFAC-PapersOnLine9th Vienna International Conference on Mathematical Modelling2307--312Data-driven surrogates of value functions and applications to feedback control for dynamical systems512018Kernel anm approximation, control, dynamic feedback from:britsteiner greedy ians optimal principle, programming techniques Dealing with high-dimensional feedback control problems is a difficult
task when the classical dynamic programming principle is applied.
Existing techniques restrict the application to relatively low dimensions
since the discretizations typically suffer from the curse of dimensionality.
In this paper we introduce a novel approximation technique for the
value function of an infinite horizon optimal control. The method
is based on solving optimal open loop control problems on a finite
horizon with a sampling of the global value function along the generated
trajectories. For the interpolation we choose a kernel orthogonal
greedy strategy, because these methods are able to produce extreme
sparse surrogates and enable rapid evaluations in high dimensions.
Two numerical examples prove the performance of the approach and
show that the method is able to deal with high-dimensional feedback
control problems, where the dimensionality prevents the approximation
by most existing methods.Data-driven surrogates of value functions and applications to feedback control for dynamical systemshttps://puma.ub.uni-stuttgart.de/bibtex/2170332c3f0ced359dd0fcfb339ab061b/britsteinerbritsteiner2021-09-29T14:33:27+02:00Kernel anm approximation, control, dynamic feedback greedy ians optimal principle, programming techniques <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="A. Schmidt" itemprop="url" href="/person/14bfa5b3c1d35696d5b7b3d202217e601/author/0"><span itemprop="name">A. Schmidt</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Bernard Haasdonk" itemprop="url" href="/person/14bfa5b3c1d35696d5b7b3d202217e601/author/1"><span itemprop="name">B. Haasdonk</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="journal">IFAC-PapersOnLine</span>, </em> <em><span itemtype="http://schema.org/PublicationVolume" itemscope="itemscope" itemprop="isPartOf"><span itemprop="volumeNumber">51 </span></span>(<span itemprop="issueNumber">2</span>):
<span itemprop="pagination">307--312</span></em> </span>(<em><span>2018<meta content="2018" itemprop="datePublished"/></span></em>)<em>9th Vienna International Conference on Mathematical Modelling.</em></span>Wed Sep 29 14:33:27 CEST 2021IFAC-PapersOnLine9th Vienna International Conference on Mathematical Modelling2307--312Data-driven surrogates of value functions and applications to feedback control for dynamical systems512018Kernel anm approximation, control, dynamic feedback greedy ians optimal principle, programming techniques Dealing with high-dimensional feedback control problems is a difficult
task when the classical dynamic programming principle is applied.
Existing techniques restrict the application to relatively low dimensions
since the discretizations typically suffer from the curse of dimensionality.
In this paper we introduce a novel approximation technique for the
value function of an infinite horizon optimal control. The method
is based on solving optimal open loop control problems on a finite
horizon with a sampling of the global value function along the generated
trajectories. For the interpolation we choose a kernel orthogonal
greedy strategy, because these methods are able to produce extreme
sparse surrogates and enable rapid evaluations in high dimensions.
Two numerical examples prove the performance of the approach and
show that the method is able to deal with high-dimensional feedback
control problems, where the dimensionality prevents the approximation
by most existing methods.Curated deformation - dynamic shape change of tessellated surfaceshttps://puma.ub.uni-stuttgart.de/bibtex/21f5d6b34382ef9a1a751f224f2d0722a/itkeitke2021-06-14T14:25:25+02:00architecture bending-active bionics change curated curvature deformation double dynamic elastic from:petraheim horvath itech itke knippers körner magna mühlich shape surfaces tesselated <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Mona Mühlich" itemprop="url" href="/person/1bd519dd915a8afc7f1ed728222450aaa/author/0"><span itemprop="name">M. Mühlich</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="David Horvath" itemprop="url" href="/person/1bd519dd915a8afc7f1ed728222450aaa/author/1"><span itemprop="name">D. Horvath</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Axel Körner" itemprop="url" href="/person/1bd519dd915a8afc7f1ed728222450aaa/author/2"><span itemprop="name">A. Körner</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Riccardo La Magna" itemprop="url" href="/person/1bd519dd915a8afc7f1ed728222450aaa/author/3"><span itemprop="name">R. La Magna</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Jan Knippers" itemprop="url" href="/person/1bd519dd915a8afc7f1ed728222450aaa/author/4"><span itemprop="name">J. Knippers</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/Book" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="name">Proceedings of the IASS Annual Symposium 2020/21</span>, </em></span>(<em><span>2021<meta content="2021" itemprop="datePublished"/></span></em>)</span>Mon Jun 14 14:25:25 CEST 2021Proceedings of the IASS Annual Symposium 2020/21Curated deformation - dynamic shape change of tessellated surfaces2021architecture bending-active bionics change curated curvature deformation double dynamic elastic from:petraheim horvath itech itke knippers körner magna mühlich shape surfaces tesselated This paper presents the development of an actively controlled shape changing surface-like structure, where geometric adaptivity is utilised by local elastic deformation on the component level. Besides the physical development of a proof of concept demonstrator, the research proposes a digital form-driving process, a computational workflow which allows the design and fast simulation of the shape changing structure, as well as the digital control of the actuation on the component level. The proposed material system consists of an initially flat surface, which is tessellated into single components based on a hexagonal grid. Each cell is comprised of a three-layer system, where a pneumatic cushion is placed in the middle of two bending active plates with strategic cut outs [1]. In this way, each cell can be pneumatically actuated and therefore elastically deformed. The induced bending in the outer plates leads to a controlled change of area – the cells shrink or expand. By controlling this local behaviour within the global arrangement according to principle geometric rules [2] it is possible to achieve a controlled shape change from an initially flat surface to an anticlastic or synclastic geometric configuration. To design, simulate and control the shape change, the authors propose a digital form driving process. Here, the cells are abstracted and simplified into polygons, which can shrink and expand within a given range, according to the proposed physical system. This allows for the fast simulation of different actuation patterns and resulting geometric changes. The abstract values of shrinkage or expansion of each cell can be translated into pressure values and are used to control the pneumatic actuators in the physical demonstrator (figure 1).Curated deformation - dynamic shape change of tessellated surfaceshttps://puma.ub.uni-stuttgart.de/bibtex/21f5d6b34382ef9a1a751f224f2d0722a/petraheimpetraheim2021-06-14T14:25:25+02:00architecture bending-active bionics change curated curvature deformation double dynamic elastic horvath itech itke knippers körner magna mühlich shape surfaces tesselated <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Mona Mühlich" itemprop="url" href="/person/1bd519dd915a8afc7f1ed728222450aaa/author/0"><span itemprop="name">M. Mühlich</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="David Horvath" itemprop="url" href="/person/1bd519dd915a8afc7f1ed728222450aaa/author/1"><span itemprop="name">D. Horvath</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Axel Körner" itemprop="url" href="/person/1bd519dd915a8afc7f1ed728222450aaa/author/2"><span itemprop="name">A. Körner</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Riccardo La Magna" itemprop="url" href="/person/1bd519dd915a8afc7f1ed728222450aaa/author/3"><span itemprop="name">R. La Magna</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Jan Knippers" itemprop="url" href="/person/1bd519dd915a8afc7f1ed728222450aaa/author/4"><span itemprop="name">J. Knippers</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/Book" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="name">Proceedings of the IASS Annual Symposium 2020/21</span>, </em></span>(<em><span>2021<meta content="2021" itemprop="datePublished"/></span></em>)</span>Mon Jun 14 14:25:25 CEST 2021Proceedings of the IASS Annual Symposium 2020/21Curated deformation - dynamic shape change of tessellated surfaces2021architecture bending-active bionics change curated curvature deformation double dynamic elastic horvath itech itke knippers körner magna mühlich shape surfaces tesselated This paper presents the development of an actively controlled shape changing surface-like structure, where geometric adaptivity is utilised by local elastic deformation on the component level. Besides the physical development of a proof of concept demonstrator, the research proposes a digital form-driving process, a computational workflow which allows the design and fast simulation of the shape changing structure, as well as the digital control of the actuation on the component level. The proposed material system consists of an initially flat surface, which is tessellated into single components based on a hexagonal grid. Each cell is comprised of a three-layer system, where a pneumatic cushion is placed in the middle of two bending active plates with strategic cut outs [1]. In this way, each cell can be pneumatically actuated and therefore elastically deformed. The induced bending in the outer plates leads to a controlled change of area – the cells shrink or expand. By controlling this local behaviour within the global arrangement according to principle geometric rules [2] it is possible to achieve a controlled shape change from an initially flat surface to an anticlastic or synclastic geometric configuration. To design, simulate and control the shape change, the authors propose a digital form driving process. Here, the cells are abstracted and simplified into polygons, which can shrink and expand within a given range, according to the proposed physical system. This allows for the fast simulation of different actuation patterns and resulting geometric changes. The abstract values of shrinkage or expansion of each cell can be translated into pressure values and are used to control the pneumatic actuators in the physical demonstrator (figure 1).The role of stochastic sequestration dynamics for intrinsic noise filtering in signaling network motifshttps://puma.ub.uni-stuttgart.de/bibtex/24d3fa6690bfb6395eab08f9c8efdcbf2/bib2istbib2ist2020-11-06T17:44:13+01:00Dynamic Retroactivity, Signaling Stochastic cascade, modeling, sequestration unchecked <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Debdas Paul" itemprop="url" href="/person/1fd53114f40d7f55abba42d5b9afae814/author/0"><span itemprop="name">D. Paul</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Nicole Radde" itemprop="url" href="/person/1fd53114f40d7f55abba42d5b9afae814/author/1"><span itemprop="name">N. Radde</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="journal">Journal of Theoretical Biology</span>, </em> </span>(<em><span>2018<meta content="2018" itemprop="datePublished"/></span></em>)</span>Fri Nov 06 17:44:13 CET 2020Journal of Theoretical Biology86 - 96The role of stochastic sequestration dynamics for intrinsic noise filtering in signaling network motifs4552018Dynamic Retroactivity, Signaling Stochastic cascade, modeling, sequestration unchecked Optimal Distribution Grid Expansion Planning under Consideration of dynamic DG Curtailmenthttps://puma.ub.uni-stuttgart.de/bibtex/27238d5ec6f33fb15d773d59c4eae7bfc/annettegugelannettegugel2020-10-12T14:39:11+02:00Consideration Curtailment DG Distribution Expansion Grid Optimal Planning dynamic <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Markus Miller" itemprop="url" href="/person/1c4c6a2bcae685f889afe4787ce65f12a/author/0"><span itemprop="name">M. Miller</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Krzysztof Rudion" itemprop="url" href="/person/1c4c6a2bcae685f889afe4787ce65f12a/author/1"><span itemprop="name">K. Rudion</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Franziska Fischer" itemprop="url" href="/person/1c4c6a2bcae685f889afe4787ce65f12a/author/2"><span itemprop="name">F. Fischer</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Haiko Nägele" itemprop="url" href="/person/1c4c6a2bcae685f889afe4787ce65f12a/author/3"><span itemprop="name">H. Nägele</span></a></span></span>. </span><span class="additional-entrytype-information">(<em><span>2020<meta content="2020" itemprop="datePublished"/></span></em>)</span>Mon Oct 12 14:39:11 CEST 2020Optimal Distribution Grid Expansion Planning under Consideration of dynamic DG Curtailment2020Consideration Curtailment DG Distribution Expansion Grid Optimal Planning dynamic Optimal Planning of High Voltage Distribution Grids under a Combined Use of Energy Storage Systems and Dynamic feed-in Managementhttps://puma.ub.uni-stuttgart.de/bibtex/24d30f82c7d8d50061a6527ba94e03497/annettegugelannettegugel2020-10-07T14:10:03+02:00Combined Distribution Dynamic Energy Grids High Management Storage Systems Use Voltage feed-in <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Ouafa Laribi" itemprop="url" href="/person/19e1dd08cdebb147b526d2a9c7c099a42/author/0"><span itemprop="name">O. Laribi</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Krzysztof Rudion" itemprop="url" href="/person/19e1dd08cdebb147b526d2a9c7c099a42/author/1"><span itemprop="name">K. Rudion</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="T. Lübbe" itemprop="url" href="/person/19e1dd08cdebb147b526d2a9c7c099a42/author/2"><span itemprop="name">T. Lübbe</span></a></span></span>. </span><span class="additional-entrytype-information">(<em><span>2019<meta content="2019" itemprop="datePublished"/></span></em>)</span>Wed Oct 07 14:10:03 CEST 2020Optimal Planning of High Voltage Distribution Grids under a Combined Use of Energy Storage Systems and Dynamic feed-in Management2019Combined Distribution Dynamic Energy Grids High Management Storage Systems Use Voltage feed-in Bending-driven Dynamic Corrugation for a Funnel Shell Designhttps://puma.ub.uni-stuttgart.de/bibtex/23f44e6b0351ce2b2083e413a47e82d49/petraheimpetraheim2020-08-26T14:22:57+02:002019 bechert bending-driven christie corrugation design dynamic funnel itke knippers shell solly <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Jorge Christie" itemprop="url" href="/person/1303eb129f438438740d1b724cde6e60a/author/0"><span itemprop="name">J. Christie</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Jonathan James Solly" itemprop="url" href="/person/1303eb129f438438740d1b724cde6e60a/author/1"><span itemprop="name">J. Solly</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Simon Bechert" itemprop="url" href="/person/1303eb129f438438740d1b724cde6e60a/author/2"><span itemprop="name">S. Bechert</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Jan Knippers" itemprop="url" href="/person/1303eb129f438438740d1b724cde6e60a/author/3"><span itemprop="name">J. Knippers</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/Book" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="name">Proceedings of the IASS Annual Symposium 2019 – Structural Membranes 2019</span>, </em></span><em>page <span itemprop="pagination">2627–2634</span>. </em><em>Barcelona, Spain, </em>(<em><span>2019<meta content="2019" itemprop="datePublished"/></span></em>)</span>Wed Aug 26 14:22:57 CEST 2020Barcelona, SpainProceedings of the IASS Annual Symposium 2019 – Structural Membranes 20192627–2634Bending-driven Dynamic Corrugation for a Funnel Shell Design20192019 bechert bending-driven christie corrugation design dynamic funnel itke knippers shell solly Funicular shells are known to be an efficient design paradigm for self-weight-driven structural surfaces [1]. Nevertheless, the rules that govern funicularity offer a fairly constrained design spectrum, limiting the scope of application for these structures [2]. The principle of corrugation has proven to be an effective approach to enable efficient structural performance in non-funicular thin shells [3]. The research presented in this paper explores the use of corrugation methods for shells in the context of a computational and structural design workflow. As an extension to existing methods, the authors introduce work on Dynamic Corrugation, a strategy for increasing bending and buckling performance on non-funicular global designs by modulating the undulation of their surfaces according to bending stress distribution.
The bending-driven dynamic corrugation method was developed during the Form and Structure seminar of the ITECH programme at the University of Stuttgart and was evaluated through the design of a non-funicular funnel shell in textile concrete. The method consists of a two-step Shape Optimization workflow that integrates NURBS-based surface generation with FEA and a Multi-Objective Genetic Algorithm (MOGA). In a first step of the design workflow, the initial design surface is analyzed to give its bending energy vector field. This field then serves as the source to generate a modulation curve passing through the areas of peak bending stresses. This curve then regulates the frequency, amplitude, and influence of local bending on the corrugation. The MOGA is given control over these variables and attempts to minimize both bending moment and displacements, offering a wide spectrum of performances and expressions along the emerging Pareto front. Simultaneously, the introduction of local curvature is evaluated on its capacity to improve the buckling resistance and to allow reductions in material thickness. The presented iterative approach is incorporated in a computational design framework. A series of Dynamic Corrugation-optimized shell samples are then compared with the initial non-corrugated design showing great structural (improved bending and buckling resistance), as well as economical and ecological (material savings) potential. Further, the expressive value of dynamically corrugated shells is deemed as a contribution to the aesthetic value of a design proposal for a small infrastructural building. Bending-driven Dynamic Corrugation for a Funnel Shell Designhttps://puma.ub.uni-stuttgart.de/bibtex/23f44e6b0351ce2b2083e413a47e82d49/itkeitke2020-08-26T14:22:57+02:00corrugation funnel knippers shell 2019 design solly itke from:petraheim christie dynamic bechert bending-driven <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Jorge Christie" itemprop="url" href="/person/1303eb129f438438740d1b724cde6e60a/author/0"><span itemprop="name">J. Christie</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Jonathan James Solly" itemprop="url" href="/person/1303eb129f438438740d1b724cde6e60a/author/1"><span itemprop="name">J. Solly</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Simon Bechert" itemprop="url" href="/person/1303eb129f438438740d1b724cde6e60a/author/2"><span itemprop="name">S. Bechert</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Jan Knippers" itemprop="url" href="/person/1303eb129f438438740d1b724cde6e60a/author/3"><span itemprop="name">J. Knippers</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/Book" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="name">Proceedings of the IASS Annual Symposium 2019 – Structural Membranes 2019</span>, </em></span><em>page <span itemprop="pagination">2627–2634</span>. </em><em>Barcelona, Spain, </em>(<em><span>2019<meta content="2019" itemprop="datePublished"/></span></em>)</span>Wed Aug 26 14:22:57 CEST 2020Barcelona, SpainProceedings of the IASS Annual Symposium 2019 – Structural Membranes 20192627–2634Bending-driven Dynamic Corrugation for a Funnel Shell Design2019corrugation funnel knippers shell 2019 design solly itke from:petraheim christie dynamic bechert bending-driven Funicular shells are known to be an efficient design paradigm for self-weight-driven structural surfaces [1]. Nevertheless, the rules that govern funicularity offer a fairly constrained design spectrum, limiting the scope of application for these structures [2]. The principle of corrugation has proven to be an effective approach to enable efficient structural performance in non-funicular thin shells [3]. The research presented in this paper explores the use of corrugation methods for shells in the context of a computational and structural design workflow. As an extension to existing methods, the authors introduce work on Dynamic Corrugation, a strategy for increasing bending and buckling performance on non-funicular global designs by modulating the undulation of their surfaces according to bending stress distribution.
The bending-driven dynamic corrugation method was developed during the Form and Structure seminar of the ITECH programme at the University of Stuttgart and was evaluated through the design of a non-funicular funnel shell in textile concrete. The method consists of a two-step Shape Optimization workflow that integrates NURBS-based surface generation with FEA and a Multi-Objective Genetic Algorithm (MOGA). In a first step of the design workflow, the initial design surface is analyzed to give its bending energy vector field. This field then serves as the source to generate a modulation curve passing through the areas of peak bending stresses. This curve then regulates the frequency, amplitude, and influence of local bending on the corrugation. The MOGA is given control over these variables and attempts to minimize both bending moment and displacements, offering a wide spectrum of performances and expressions along the emerging Pareto front. Simultaneously, the introduction of local curvature is evaluated on its capacity to improve the buckling resistance and to allow reductions in material thickness. The presented iterative approach is incorporated in a computational design framework. A series of Dynamic Corrugation-optimized shell samples are then compared with the initial non-corrugated design showing great structural (improved bending and buckling resistance), as well as economical and ecological (material savings) potential. Further, the expressive value of dynamically corrugated shells is deemed as a contribution to the aesthetic value of a design proposal for a small infrastructural building.