New adaptive identification method of critical loop gain for multi-input multi-output plants

被引：0

作者：

Saeki, Masami ^{[1
]}

机构：

[1] Hiroshima Univ, Higashi-Hiroshima, Japan

来源：

| 1998年 / IEEE, Piscataway, NJ, United States卷 / 04期

关键词：

Adaptive control systems - Control nonlinearities - Convergence of numerical methods - Functions - Gain control - Industrial plants - Multivariable control systems - Three term control systems - Time varying control systems;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

A new identification method of the critical gain and the critical frequency is proposed. This method can be applied to a large industrial plant with many controllers, and the convergence of the identification procedure is guaranteed theoretically. This method is simple and is not sensitive to disturbances. As far as the author knows, such method that has these merits has never been proposed before. It can be used for tuning the multi-loop PID controllers by Ziegler-Nichols rule. Instead of using relay feedback, a saturation nonlinearity and a time-varying gain are inserted in the loop, and the gain is tuned by the difference signal between the input and the output of the saturation function so that a sinusoidal oscillation may continue.

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