{ "types" : { "Bookmark" : { "pluralLabel" : "Bookmarks" }, "Publication" : { "pluralLabel" : "Publications" }, "GoldStandardPublication" : { "pluralLabel" : "GoldStandardPublications" }, "GoldStandardBookmark" : { "pluralLabel" : "GoldStandardBookmarks" }, "Tag" : { "pluralLabel" : "Tags" }, "User" : { "pluralLabel" : "Users" }, "Group" : { "pluralLabel" : "Groups" }, "Sphere" : { "pluralLabel" : "Spheres" } }, "properties" : { "count" : { "valueType" : "number" }, "date" : { "valueType" : "date" }, "changeDate" : { "valueType" : "date" }, "url" : { "valueType" : "url" }, "id" : { "valueType" : "url" }, "tags" : { "valueType" : "item" }, "user" : { "valueType" : "item" } }, "items" : [ { "type" : "Publication", "id" : "https://puma.ub.uni-stuttgart.de/bibtex/2e63cc375d96f1cf07fdd2f4b06f8b3fd/annettegugel", "tags" : [ "Analysis","Disc","Function","Power","Space","Transfer","Transformer","Variation" ], "intraHash" : "e63cc375d96f1cf07fdd2f4b06f8b3fd", "interHash" : "44a4811f357ef3961aa531bc51dd8143", "label" : "A Mathematical Model to Investigate Disc Space Variation in Power Transformer using Transfer Function Analysis", "user" : "annettegugel", "description" : "", "date" : "2020-07-13 14:10:32", "changeDate" : "2020-07-13 12:10:32", "count" : 1, "pub-type": "conference", "year": "2007", "url": "", "author": [ "Ebrahim Rahimpour","Stefan Tenbohlen" ], "authors": [ {"first" : "Ebrahim", "last" : "Rahimpour"}, {"first" : "Stefan", "last" : "Tenbohlen"} ], "eventtitle" : "15th International Symposium on High Voltage Engineering", "venue" : "Ljubljana, Slovenia", "eventdate" : "August 27-31", "bibtexKey": "rahimpour2007mathematical" } , { "type" : "Publication", "id" : "https://puma.ub.uni-stuttgart.de/bibtex/25fad754a5f042db860777514d491624c/annettegugel", "tags" : [ "Disc","Function","High-","Method","Space","Transfer","Variation","Voltage","Windings","real" ], "intraHash" : "5fad754a5f042db860777514d491624c", "interHash" : "cad6f6e2c4c0dadb43d9f9b32dbeb670", "label" : "Experimental and Theoretical Investigation of Disc Space Variation in real High-\r\nVoltage Windings using Transfer Function Method", "user" : "annettegugel", "description" : "", "date" : "2020-06-23 15:23:23", "changeDate" : "2020-06-23 13:32:40", "count" : 1, "pub-type": "article", "journal": "IET Electr. Power Appl.", "year": "2010", "url": "", "author": [ "Ebrahim Rahimpour","Stefan Tenbohlen" ], "authors": [ {"first" : "Ebrahim", "last" : "Rahimpour"}, {"first" : "Stefan", "last" : "Tenbohlen"} ], "volume": "4","number": "6","pages": "451-461", "bibtexKey": "rahimpour2010experimental" } , { "type" : "Publication", "id" : "https://puma.ub.uni-stuttgart.de/bibtex/23db438f1fb0ad0623233c997926c96af/isw-bibliothek", "tags" : [ "Modelingsend:unibibliosend:unibibliosend:unibibliosend:unibiblio","Null-Fehler-Fertigung,","Part","Variation","isw," ], "intraHash" : "3db438f1fb0ad0623233c997926c96af", "interHash" : "c50b1b99f4aac05a22bea84617923420", "label" : "Part Variation Modeling in Multi-Stage Production Systems for Zero-Defect Manufacturing", "user" : "isw-bibliothek", "description" : "", "date" : "2019-07-24 14:20:19", "changeDate" : "2019-07-24 12:26:41", "count" : 2, "pub-type": "inproceedings", "booktitle": "2019 IEEE International Conference on Industrial Technology (ICIT)", "year": "2019", "url": "https://ieeexplore.ieee.org/document/8754964/", "author": [ "Florian Eger","Philipp Tempel","Maria Chiara Magnanini","Colin Reiff","Marchello Colledani","Alexander Verl" ], "authors": [ {"first" : "Florian", "last" : "Eger"}, {"first" : "Philipp", "last" : "Tempel"}, {"first" : "Maria Chiara", "last" : "Magnanini"}, {"first" : "Colin", "last" : "Reiff"}, {"first" : "Marchello", "last" : "Colledani"}, {"first" : "Alexander", "last" : "Verl"} ], "pages": "1017-1022","abstract": "Multi-stage production systems concede for low error and failure margins within every single machining and assembly step to not degrade product quality. Especially during multi-stage production of rotating parts, minor defects during a single step can corrupt a workpiece beyond repair. Since multistage production systems are complex, inter-connected chains of machining steps, a global approach to handling and compensating error emergence and propagation is for reaching Zero-Defect Manufacturing indispensable. We introduce Part Variation Modeling within a knowledge capturing platform to monitor centrally gathered metrological data for deviations. Further, a parametric model is presented allowing for description of rotating parts and enabling identification of deviations at every stage. Based on our inter-stage correlation analysis technique, the parametric model enables description of Part Variation Modes of a piece given current machine states and historic deviation likelihood as will be presented.", "issn" : "2643-2978", "doi" : "10.1109/ICIT.2019.8754964", "bibtexKey": "eger2019variation" } , { "type" : "Publication", "id" : "https://puma.ub.uni-stuttgart.de/bibtex/2151deb6e49472c757ef90140600c26f0/isw-bibliothek", "tags" : [ "ISW","Process","chatter","control","myown","online","speed","spindle","stability","variation","xfh","xvl" ], "intraHash" : "151deb6e49472c757ef90140600c26f0", "interHash" : "63a5086d74f022b9353f2d51bec4ebd1", "label" : "Adaptive spindle speed variation to improve process stability", "user" : "isw-bibliothek", "description" : "", "date" : "2016-03-03 09:53:12", "changeDate" : "2016-03-29 15:32:50", "count" : 1, "pub-type": "inproceedings", "booktitle": "Proceedings of the 22nd International Conference on Production Research", "year": "2013", "url": "", "author": [ "Jens Friedrich","Alexander Verl" ], "authors": [ {"first" : "Jens", "last" : "Friedrich"}, {"first" : "Alexander", "last" : "Verl"} ], "pages": "--","abstract": "A limiting factor of the performance of machine tools is the dynamic processbehavior. Suppression of chatter is still an important measure to increaseproductivity. Spindle speed variation is a known possibility to reduce chattervibrations without changes to the machine tool using the degree-of-freedom ofthe spindle speed. In this paper the new adaptive spindle speed variation(ASSV) method is presented. The ASSV algorithm automatically adapts theamplitude and the frequency of the spindle speed variation due to the currentprocess stability conditions taking into account the machine capability andthe process technology. A simulation model of the milling process is used toanalyze and verify the functionality of the ASSV. With just using a simple P-or PI-controller in combination with the ASSV algorithm the depth of cut andthus the productivity can be increased to 150% in comparison to cutting withconstant spindle speed with respect to the displacement of the tool tip.", "__markedentry" : "[xtl:6]", "bibtexKey": "FriedrichVerl2013" } , { "type" : "Publication", "id" : "https://puma.ub.uni-stuttgart.de/bibtex/21d105d031e70665b4d9de4fe83af6da5/isw-bibliothek", "tags" : [ "ISW","chatter","control","milling","myown","process","speed","spindle","stability","variation","xfh","xvl" ], "intraHash" : "1d105d031e70665b4d9de4fe83af6da5", "interHash" : "0a93c816d409441a17251befe7ebb7bf", "label" : "In-process Control for Adaptive Spindle Speed Variation and Selection", "user" : "isw-bibliothek", "description" : "", "date" : "2016-03-03 09:53:12", "changeDate" : "2016-03-29 15:26:10", "count" : 1, "pub-type": "inproceedings", "booktitle": "Proceedings of the International Conference on Advanced Manufacturing Engineering and Technologies NEWTECH 2013", "year": "2013", "url": "http://www.diva-portal.org/smash/get/diva2:660817/FULLTEXT08.pdf#page=117", "author": [ "Jens Friedrich","Alexander Verl" ], "authors": [ {"first" : "Jens", "last" : "Friedrich"}, {"first" : "Alexander", "last" : "Verl"} ], "pages": "117-126","abstract": "The productivity of the milling process is limited by the cutting depth. Thecritical cutting depth varies for different spindle speeds. Unstable processescan be stabilized by varying the spindle speed. This paper presents a newapproach to stabilize the process by using adaptive spindle speed variationand selection (ASSV/ASSS). Based on the current cutting conditions theparameters of the ASSV are calculated by an in-process feedback controller tostabilize the process. In parallel a new stable spindle speed for the cuttingdepth is derived and selected (ASSS). Even if there exists no stable spindlespeed for the cutting depth, the ASSV stabilizes the process. The results areverified with simulations and with experiments on a commercial millingmachine. The application of ASSV/ASSS increases the stable cutting depth andthus the productivity with constant speed by 233% and reduces the displacementof the tool tip by the factor of 10.", "__markedentry" : "[xtl:6]", "bibtexKey": "JensFriedrich2013" } ] }