Abstract
The core avionics of the Ariane 5 launcher was developed in the early 90s and might be not optimal
with respect to today's requirements and technological advances. In a study within the PREPARE
project formal modeling and mathematical optimization are used to "rethink" the avionics. Based on
the Integrated Modular Avionics (IMA) concept the best candidates for a future avionics architecture
are derived. The results show improvement potentials up to 50%. The most promising architectures are
analyzed in detail and relations between objectives and architectural artefacts are discovered. The
study results and the used method seem important for future launcher development.
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