Dimension reduction based on approximate gramians via Laguerre polynomials for coupled systems
Zhen-Zhong Qi,
Zhi-Hua Xiao,
Jia-Wei Yuan
Abstract:In this paper, we focus on the topic of model order reduction (MOR) for coupled systems. At first, an approximation via Laguerre polynomials expansions to controllability and observability gramians for such systems are presented, which provides a low-rank decomposition form whose factors are constructed from a recurrence formula instead of Lyapunov equations. Then, in combination of balanced truncation and dominant subspace projection method, a series of MOR algorithms are proposed that preserve the coupled st… Show more
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