A Survey of Pid Controller Design Based on Gain and Phase Margins(invited Paper)

This paper focuses on the PID controller design based on the gain and phase margin (GPM) specifications for a given signalinput-signal-output plant. The basic ideas, techniques, and results are presented in language and notation familiar. Since the definitions of GPM equations are highly nonlinear, an analytical tuning method is not yet available. Approximation and fuzzy neural network (FNN) approaches are adopted to treat this problem. Then, they are used to automatically tune the PID controller parameters for GPM specifications so that neither numerical methods nor graphical methods need be used. Applications of usual used processfirst order with time delay plant are extended to general plant by the FNN approach. In addition, the robust PID controller is definition and presented. Finally, a novel PI-PD controller scheme based on GPM is firstly proposed to obtain the better performance. Simulation results are also presented to show the effectiveness. c ©2003 Yang’s Scientific Research Institute, LLC. All rights reserved.