基于pid结构的解耦控制器-系统工程学报.pdf

27 4 Vol.27 No.4 2012 8 JOURNAL OF SYSTEMS ENGINEERING Aug. 2012 PID , (1. , 110004; 2. , 110004) : PID. , , RBF . , , . , PIDPID, . , , . : ; ; PID; : TP273 : A :2012 Decoupling controller design based PID structure LI Lei , MAO Zhi-zhong (1. College of Information Science Engineering, Northeastern University, Shenyang 110004, China; 2. Key Laboratory of Integrated Automation of Process Industry, Ministry of Education, Northeastern University, Shenyang 110004, China ) Abstract: A multivariable decoupling controller based on PID structure is proposed for generalized learning model (GLM). The GLM assumes that the unknown complex plant is represented by an equivalent model consisting of a linear time varying sub model plus a nonlinear learning sub model. The parameters of the linear time varying sub model are identified by partial least squares (RLS) method and a RBF neural network is used to approximate the nonlinear learning sub model. The poles and zeros of the close-loop system can be assigned arbitrarily by a compensate polynomial, and the performance of the system can be improved greatly. In addition, the parameters of the PID structure can be selected according to the conventional PID controller and the parameters of the pole-zero section can be selected by the desired zeros and poles. At last, the effectiveness of the proposed controller is verified by the simulation results on the electrode regulator system. Key words: generalized learning model (GLM)