Damping optimization of parameter dependent mechanical systems by rational interpolation

dc.contributor.authorTomljanović, Z.en
dc.contributor.authorBeattie, Christopher A.en
dc.contributor.authorGugercin, Serkanen
dc.contributor.departmentMathematicsen
dc.date.accessioned2018-01-25T17:22:25Zen
dc.date.available2018-01-25T17:22:25Zen
dc.date.issued2017-07-06en
dc.description.abstractWe consider an optimization problem related to semi-active damping of vibrating systems. The main problem is to determine the best damping matrix able to minimize influence of the input on the output of the system. We use a minimization criteria based on the $\mathcal{H}_2$ system norm. The objective function is non-convex and the associated optimization problem typically requires a large number of objective function evaluations. We propose an optimization approach that calculates `interpolatory' reduced order models, allowing for significant acceleration of the optimization process. In our approach, we use parametric model reduction (PMOR) based on the Iterative Rational Krylov Algorithm, which ensures good approximations relative to the $\mathcal{H}_2$ system norm, aligning well with the underlying damping design objectives. For the parameter sampling that occurs within each PMOR cycle, we consider approaches with predetermined sampling and approaches using adaptive sampling, and each of these approaches may be combined with three possible strategies for internal reduction. In order to preserve important system properties, we maintain second-order structure, which through the use of modal coordinates, allows for very efficient implementation. The methodology proposed here provides a significant acceleration of the optimization process; the gain in efficiency is illustrated in numerical experiments.en
dc.identifier.urihttp://hdl.handle.net/10919/81926en
dc.relation.urihttp://arxiv.org/abs/1707.01789v1en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectmath.DSen
dc.subject49J15en
dc.subject74P10en
dc.subject70Q05en
dc.subject41A05en
dc.titleDamping optimization of parameter dependent mechanical systems by rational interpolationen
dc.typeArticle - Refereeden
pubs.organisational-group/Virginia Techen
pubs.organisational-group/Virginia Tech/All T&R Facultyen
pubs.organisational-group/Virginia Tech/Scienceen
pubs.organisational-group/Virginia Tech/Science/COS T&R Facultyen
pubs.organisational-group/Virginia Tech/Science/Mathematicsen

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