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arXiv 2404.04576math.OCcs.SYeess.SY
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基于线性矩阵不等式的分布式控制器设计的凸重构——一类非块对角Lyapunov函数

Convex Reformulation of LMI-Based Distributed Controller Design with a Class of Non-Block-Diagonal Lyapunov Functions

University of California San Diego(加州大学圣地亚哥分校)

Yuto Watanabe, Sotaro Fushimi, Kazunori Sakurama

AI总结:

针对连续时间线性时不变系统的分布式状态反馈控制器设计问题,提出基于非块对角Lyapunov函数的凸重构方法,通过稀疏矩阵分解和Finsler引理推导新LMIs,提升控制性能并通过数值示例验证有效性。

摘要:

本研究针对连续时间线性时不变系统,通过线性矩阵不等式(LMIs)解决分布式状态反馈控制器设计问题。由于控制增益的结构约束通常导致非凸性,Lyapunov函数的块对角松弛虽存在保守性但仍被广泛应用。本文针对一类与分布式控制器具有相同稀疏模式的非块对角Lyapunov函数展开研究。通过利用稀疏矩阵的块对角分解和Finsler引理,首先提出一种非线性矩阵不等式,用于稳定采用此类Lyapunov函数的分布式控制器;若稀疏模式为弦图,则该不等式等价于此类控制器稳定的充要条件。作为其松弛形式,推导得到新的LMIs,其中一个严格覆盖传统松弛,并针对H∞控制提供类似结果。最后,数值示例强调了研究结果的有效性。

英文摘要:

This study addresses a distributed state feedback controller design problem for continuous-time linear time-invariant systems by means of linear matrix inequalities (LMIs). As structural constraints on a control gain result in non-convexity in general, the block-diagonal relaxation of Lyapunov functions has been prevalent despite its conservatism. In this work, we target a class of non-block-diagonal Lyapunov functions with the same sparsity pattern as distributed controllers. By leveraging a block-diagonal factorization of sparse matrices and Finsler's lemma, we first present a nonlinear matrix inequality for stabilizing distributed controllers with such Lyapunov functions, which boils down to a necessary and sufficient condition for such controllers if the sparsity pattern is chordal. As its relaxation, we derive novel LMIs, one of which strictly covers the conventional relaxation, and then provide analogous results for $H_\infty$ control. Lastly, numerical examples underscore the efficacy of our results.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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