Design of a performance-driven PID controller for a nonlinear system

In industrial control processes, it requires fast response for transient state and for steady state it is necessary to maintain user-specified control performance to achieve desired productivity. Moreover, the Proportional-Integral-Derivative(PID) control algorithm is widely used in industrial control processes. Hence, in this paper an algorithm to tune PID control parameters that can improve control performances of transient state and steady state is proposed. In proposed method, the PID control parameters are tuned by using cerebellar model articulation controller(CMAC) for both in transient and steady state. At the same time, in order to avoid the error that may caused by modeling of system, the CMAC is combine with the algorithm of fictitious reference iterative tuning (FRIT). Therefore, the PID control parameters can be off-line tuned without using system parameters. At last, the effectiveness of the proposed method is numerically verified by using a simulation example.