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このアイテムを引用あるいはリンクする場合は次の識別子を使用してください  http://hdl.handle.net/10228/930

タイトル: Effects of Nonsynchronism on Multirate Sampled-Data Systems: L_p Worst-Case Performance,Robutness and Computation
著者: Ito, Hiroshi
Department of Control Engineering and Science, Kyushu Institute of Technology
九州工業大学情報工学部 制御システム工学科
伊藤, 博
キーワード: nonsynchronism
multirate sampled-data control
decentralized control
発行日: 2000年5月8日
出版者: 九州工業大学
抄録: This paper focuses on multi-rate sample-data control with nonsynchronous decentralized controllers whose sampler-and-hold elements in di erent stations update their state independently of each other. Phases of discrete-time events in decentralized control stations are di erent because of digital control with multiple processors although each controller in a station is a synchronous single-rate sampled-data controller. The paper analyzes the e ect of the nonsynchronous phase distribution on Lp worst-case performance and stability. New representations of the nonsynchronous sample-data system are presented for analyzing and computing performance degradation caused by the nonsynchronism. The method of analysis is further modi ed to propose an approach to design of Lp-induced norm suboptimal nonsynchronous multi-rate controllers. Some results on stability and performance robustness for the nonsynchronous closed-loop systems are developed. Furthermore, it is shown that the worst-case performance measure is a continuous function of the phase shift provided that anti-aliasing lters are located appropriately. Slight perturbation of the phase only results in a slight degradation or improvement of the closed-loop performance. The analysis of the continuity property enables us to estimate how robust the performance is against the phase perturbation.
URI: http://hdl.handle.net/10228/930


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