Input–output based pole-placement controller for a class of time-delay systems

Abstract

A controller structure valid for SISO plants involving both internal and external point delays is presented. The control signal is based only on the input and output plant signals. The controller allows finite or infinite spectrum assignment. The most important feature of the proposed controller is that it only involves the use of a class of point-delayed signals. Thus the controller synthesis involves less computational cost than former methods. Since the plant control input is generated by filtering the input and output plant signals, this controller structure is potentially applicable to the adaptive case of unknown plant parameters.