Abstract
This paper deals with an iterative approach of closed-loop identification and IMC (internal model control) design for input time delay systems. IMC is one of simple design methods for systems with time delay, however, IMC requires system parameters exactly. In this paper, a joint design method of closed-loop identification and IMC structure for input time delay systems is proposed. The control purpose, which is similar to the windsurfer approach, is to achieve the increase in the bandwidth of the closed-loop system. A multiplicative uncertainty of input time delay systems becomes smaller, when an IMC filter time constant is chosen smaller. A simulation example is shown to illustrate these results.
