Design and Analysis for Robust PID Controller

Abstract

This paper presented a robust PID controller design for time delay system. Utilizing the gain-phase margin tester method, a specification-oriented parameter region in the parameter plane that characterizes all admissible controller coefficients sets can be obtained. The PID controller gains are then directly selected from the parameter region. And the designed controller can guarantee the system at least a pre-specified safety margin to compensate for instability induced by time delay. A compromise between the performances of the system with the above mentioned and smith predictor is also included. The simulations are carried by TRUETIME network simulator for virtually implementation of NETWORKED CONTROL SYSTEM. The simulation results proves the mentioned PID controller is performs good time response and also compensate the delay is obtained efficiently. Index Terms: Non-minimum phase system, network control system, delays Compensation, gain margin, phase margin, PID controller,and Distributed system.