著者

山本 義春 内田 健康 小原 收 銅谷 賢治 木村 英紀

出版者

計測自動制御学会

雑誌

計測と制御 = Journal of the Society of Instrument and Control Engineers (ISSN:04534662)

巻号頁・発行日

vol.47, no.3, pp.237-247, 2008-03-10

著者

渡辺 亮 内田 健康 藤田 政之

出版者

The Society of Instrument and Control Engineers

雑誌

計測自動制御学会論文集 (ISSN:04534654)

巻号頁・発行日

vol.35, no.7, pp.861-868, 1999-07-30 (Released:2009-03-27)

参考文献数

22

被引用文献数

3 4

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The actual control systems possess some kind of restrictions on the control inputs like saturation, rate limit, and so on. It is known that these restrictions usually cause the large overshoot of the controlled variables for step reference signals. This overshoot phenomenon is called the windup phenomenon. Though the windup phenomenon crucially causes the undesirable performance of the actual control systems, formulation of the windup phenomenon from a control-theoretical point of view has not been proposed yet.In this paper, we characterize the windup phenomenon via output reachable sets and propose analysis technique for the windup based on reachable set analysis. Then we propose a new framework for anti-windup technique and characterize its anti-windup performance via output reachable sets. We also propose analysis technique for anti-windup performance based on reachable set analysis.

著者

山中 一雄 内田 健康 示村 悦二郎

出版者

The Society of Instrument and Control Engineers

雑誌

計測自動制御学会論文集 (ISSN:04534654)

巻号頁・発行日

vol.13, no.4, pp.318-323, 1977-08-30 (Released:2009-03-27)

参考文献数

7

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In a stochastic linear composite system, which is composed of several subsystems, it may be desired to obtain an estimate of the state of only one particular subsystem. A usual approach to this problem will be to construct a Kalman-Bucy filter for the total system, and to obtain the required partial state estimate as a part of the total one. That is, a dynamical filter of the same dimension as that of the total system is necessary for only the partial state estimation. From the computational view point, it is preferable to obtain a partial estimate by a suitable dynamical filter, which is not necessarily optimal, of the dimension of that subsystem. In this paper, we consider a class of composite systems in which two subsystems are coupled and their time responses are widely different. And we propose a method to synthesize an approximate filter for the “slower” subsystem. It is also shown that the approximation error vanishes as the ratio of the maximum eigenvalue of the “slower” subsystem to the minimum eigenvalue of the “faster” subsystem approaches to zero.

著者

杉山 高洋 内田 健康

出版者

一般社団法人 システム制御情報学会

雑誌

システム制御情報学会論文誌 (ISSN:13425668)

巻号頁・発行日

vol.14, no.3, pp.110-116, 2001-03-15

参考文献数

8

被引用文献数

2 6

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Because of the reasons of favorable features such as high driving force, fast response, fine environmental durability and big distortion about 10 times more than that of PZT, GMM (Giant Magnetrostrictive Material) is suitable for the actuation structure of servovalve. But, GMM distortion depends on the magnitude of coil current and the output-gain declines according to decreasing current magnitude. Then, the dead-zone appears in small current range. One of the important characteristics of servovalve is the fine tracking performance to the reference signal. So far, we attempted to apply linear controllers, such as PI or <I>H</I><SUP>&infin;</SUP>controller. However GMM tracking performance is inferior to the traditional driving device for reference signal around null area, and this flaw remains as an important matter.<BR>In this paper, adopting LPV (Linear Parameter-Varying) system modeling in which we regard the magnitude of input signal as a scheduling parameter, we design a gain scheduling controller and attempt to solve the problem that is caused by the nonlinearities mentioned above. Since it is hard to implement the controller which uses the information on the varying rate of scheduling parameters, we propose a new approach for output-feedback controller design. First, we describe the plant modeling as an LPV system, then present an outline of the controller design synthesis without any information on the varying rate of scheduling parameter and the design process. Lastly, we show the usefulness of the proposed controller by experimental results.

著者

児島 晃 内田 健康

出版者

公益社団法人 計測自動制御学会

雑誌

計測と制御 (ISSN:04534662)

巻号頁・発行日

vol.45, no.1, pp.67-74, 2006-01-10 (Released:2009-11-26)

参考文献数

20

被引用文献数

1