Sampling-free model reduction of systems with low-rank parameterization
Sampling-free model reduction of systems with low-rank parameterization
复制标题
低秩参数化系统的免采样模型简化
DOI:
10.1007/s10444-020-09825-8
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发表时间:
2020
影响因子:
1.7
通讯作者:
Tomljanović, Zoran
中科院分区:
文献类型:
--
作者:
Beattie, Christopher;Gugercin, Serkan;Tomljanović, Zoran
We consider the reduction of parametric families of linear dynamical systems having an affine parameter dependence that allow for low-rank variation in the state matrix. Usual approaches for parametric model reduction typically involve exploring the parameter space to identify representative parameter values and the associated models become the principal focus of model reduction methodology. These models are then combined in various ways in order to interpolate the response. The initial exploration of the parameter space can be a forbiddingly expensive task. A different approach is proposed here that requires neither parameter sampling nor parameter space exploration. Instead, we represent the system response function as a composition of four subsystem response functions that arenon-parametricwith a purely parameter-dependent function. One may apply any one of a number of standard (non-parametric) model reduction strategies to reduce the subsystems independently, and then conjoin these reduced models with the underlying parameterization to obtain the overall parameterized response. Our approach has elements in common with the parameter mapping approach of Baur et al. (PAMM14(1), 19–22 2014) but offers greater flexibility and potentially greater control over accuracy. In particular, a data-driven variation of our approach is described that exercises this flexibility through the use of limited frequency-sampling of the underlying non-parametric models. The parametric structure of our system representation allows for a priori guarantees of system stability in the resulting reduced models across the full range of parameter values. Incorporation of system theoretic error bounds allows us to determine appropriate approximation orders for the non-parametric systems sufficient to yield uniformly high accuracy across the parameter range. We illustrate our approach on a class of structural damping optimization problems and on a benchmark model of thermal conduction in a semiconductor chip. The parametric structure of our reduced system representation lends itself very well to the development of optimization strategies making use of efficient cost function surrogates. We discuss this in some detail for damping parameter and location optimization for vibrating structures.
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DOI:
10.1137/1.9781611974829
发表时间:
2015-11
期刊:
arXiv: Numerical Analysis
影响因子:
--
作者:
A. Nouy
通讯作者:
A. Nouy
DOI:
10.1137/1.9781611974829.fm
发表时间:
2017
期刊:
PAMM
影响因子:
--
作者:
P. Benner;A. Cohen;Mario Ohlberger;K. Willcox
通讯作者:
K. Willcox
影响因子:
3.1
作者:
Nakatsukasa, Yuji;Sete, Olivier;Trefethen, Lloyd N.
通讯作者:
Trefethen, Lloyd N.
DOI:
10.1109/tcpmt.2011.2167973
发表时间:
2011-11-01
影响因子:
2.2
作者:
Chinea, Alessandro;Grivet-Talocia, Stefano
通讯作者:
Grivet-Talocia, Stefano
DOI:
--
发表时间:
2020
期刊:
arXiv.org
影响因子:
--
作者:
Andrea Carracedo Rodriguez;S. Gugercin
通讯作者:
S. Gugercin