Multi-rate Control System for Improvement in Intersample Response Based on State-space Representation

カテゴリ: 論文誌(論文単位)

グループ名: 【C】電子・情報・システム部門

発行日: 2012/06/01

タイトル(英語): Multi-rate Control System for Improvement in Intersample Response Based on State-space Representation

著者名: Takao Sato (Graduate School of Engineering, University of Hyogo), Yoshiki Hattori (Graduate School of Engineering, University of Hyogo), Nozomu Araki (Graduate School of Engineering, University of Hyogo), Yasuo Konishi (Graduate School of Engineering, Uni

著者名(英語): Takao Sato (Graduate School of Engineering, University of Hyogo), Yoshiki Hattori (Graduate School of Engineering, University of Hyogo), Nozomu Araki (Graduate School of Engineering, University of Hyogo), Yasuo Konishi (Graduate School of Engineering, University of Hyogo)

キーワード: multi-rate control system，steady state，sample response，intersample response，state-space representation

要約(英語): The decision of sampling and hold intervals is an important issue in the design of sampled-data control systems, in which a continuous-time plant is controlled using a digital computer in discrete time, and the selection of intervals greatly influences the control quality. However, it is not easy to set these intervals arbitrarily because of hardware constraints. This paper proposes a new method for the design of a multi-rate single-input single-output sampled-data control system under the constraint that the sampling interval of the plant output in continuous time is an integer multiple of the hold interval of the control input, which is updated in discrete time. In the design of the multi-rate control system, the intersample plant output can possibly oscillate even if the sampled plant output converges to its reference input. In conventional design methods, to improve intersample ripples, both the sample and the intersample responses are simultaneously designed, and then, the original sample response might be deteriorated even though the intersample response is improved. In this study, a multi-rate control law, which stabilizes a closed-loop system, is extended on the basis of state-space representation, and the multi-rate control system is redesigned such that the steady-state intersample response is improved independently of the sample response. As a result, the sample response is maintained and the intersample response is improved in the steady state. Numerical examples demonstrate the effectiveness of the proposed method.

本誌: 電気学会論文誌C（電子・情報・システム部門誌） Vol.132 No.6 （2012） 特集：データ指向型モデリング/予測/制御

本誌掲載ページ: 866-872 p

原稿種別: 論文／英語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejeiss/132/6/132_866/_article/-char/ja/