Abstract
In this paper, for the design of delay time control systems a notice is taken on the minimum-phase state of the controlled object. By the feedback on the observed minimum-phase state, the control system can be stabilized diminishing the effect of delay times. And feed forward compensation is expected on a standpoint to cancel delay times in the input-output characteristics. For the delay time control systems the decoupling control is necessary, and the design of decoupling tandem compensator with the minimum degree is shown. The feedback on the observed minimum-phase state and the feed forward compensation are also useful for delay time decoupling control systems. A numerical example for the 2input 2output controlled object with delay time characteristics is shown and the decoupling control with the feedforward compensation is designed.
