Design of grey PID controller for DC Servo Motor
Hong Li1, Zong Zhe Wang2
COMPUTER MODELLING & NEW TECHNOLOGIES 2014 18(5) 118-123
1School of Information Engineering, Xianyang Normal University, Shaanxi, 712000. P. R. China
2Northwest Electric Power Construction Corporation, Shaanxi, 712000. P. R. China
Concerning the uncertainties may be existed in DC motor servo system and the control quality that the external disturbance may influence the control algorithm of traditional PID, a kind of PID control algorithm based on grey prediction theory was proposed. With the grey theory’s processing ability on the unknown information data, the algorithm established the grey model for the uncertainties, and real-time compensated the system’s unmodelled feature and disturbance signal, thus improving the control precision. The simulation result can show that the proposed PID control algorithm based on grey prediction theory can effectively predict and compensate the unmodelled feature and disturbance signal in DC motor servo system and improve the control precision of the controller, thus providing the theoretical basis for the industrial application of PID control algorithm based on grey prediction theory.