Design of Multi-Input Multi-Output Delay Time Control System with Feedforward Compensation

In this paper, for the design of delay time control systems the minimum-phase state of the controlled object is considered. By feedback on the observed minimum-phase state, the control system can be stabilized, diminishing the effect of delay times. Feedforward compensation offers the possibility of canceling the delay times in the input-output characteristics. For delay time control systems decoupling control is necessary, and the design of a decoupling tandem compensator with the minimum degree is shown. Feedback on the observed minimum-phase state and feedforward compensation are also useful for delay time decoupling control systems. A numerical example for a two-input two-output controlled object with delay time characteristics is presented and decoupling control with feedforward compensation is designed. (C) 2011 Wiley Periodicals, Inc. Electr Eng Jpn, 176(4): 34-44, 2011; Published online in Wiley Online Library (wileyonlinelibrary.com). DOI 10.1002/eej.21118