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Data-Driven Reduced Model Construction with Time-Domain Loewner Models

Author(s)
Gugercin, Serkan; Peherstorfer, Benjamin; Willcox, Karen E
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Abstract
This work presents a data-driven nonintrusive model reduction approach for large-scale time-dependent systems with linear state dependence. Traditionally, model reduction is performed in an intrusive projection-based framework, where the operators of the full model are required either explicitly in an assembled form or implicitly through a routine that returns the action of the operators on a vector. Our nonintrusive approach constructs reduced models directly from trajectories of the inputs and outputs of the full model, without requiring the full-model operators. These trajectories are generated by running a simulation of the full model; our method then infers frequency-response data from these simulated time-domain trajectories and uses the data-driven Loewner framework to derive a reduced model. Only a single time-domain simulation is required to derive a reduced model with the new data-driven nonintrusive approach. We demonstrate our model reduction method on several benchmark examples and a finite element model of a cantilever beam; our approach recovers the classical Loewner reduced models and, for these problems, yields high-quality reduced models despite treating the full model as a black box. Key words: data-driven model reduction, nonintrusive model reduction, projection-based reduced models, Loewner framework, black-box models, dynamical systems, partial differential equations
Date issued
2017-09
URI
http://hdl.handle.net/1721.1/116613
Department
Massachusetts Institute of Technology. Department of Aeronautics and Astronautics
Journal
SIAM Journal on Scientific Computing
Publisher
Society for Industrial & Applied Mathematics (SIAM)
Citation
Peherstorfer, Benjamin, et al. “Data-Driven Reduced Model Construction with Time-Domain Loewner Models.” SIAM Journal on Scientific Computing, vol. 39, no. 5, Jan. 2017, pp. A2152–78. © 2017 Society for Industrial and Applied Mathematics
Version: Final published version
ISSN
1064-8275
1095-7197

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