Large Inertia Servo System Intelligent Pid Algorithm Research

With the rapid development of computer technology and AC motor timing technology, modern digital servo system has been changed a lot. All kinds of new control algorithm and timing methods have been used in reality control systems, which make modern servo systems small, intelligent, high-speed and accurate. Combining with a suit of actual AC servo system, this paper emphasizes on studying the intelligent PID control algorithm, which can realize the target with high-speed and good-accuracy.Considering the control object of servo system in this paper has great inertia, high accuracy and response speed, the global structure of control system is confirmed. Meanwhile the servo controller, sample control circuit, output control circuit and external interface circuits are designed according to main control chip TMS320F206 DSP.The software function and whole flow chart of servo control card are analyzed in this paper. The software algorithms of reading command, sampling position information are introduced. Also the intelligent PID control algorithm combined with subarea variable parameter method and compound control method is detaily discussed.In the simulation environment of matlab, the servo control system of position close-loop is construced. The simulation study of traditional PID and intelligent PID is carried out. Through the compare research, the high effect and feasibility of intelligent PID control algorithm are clearly shown. The digital processing method for forward-feedback control signals is analyzed and simulated.In the simulation environment and actual application, the digital servo system with great inertia receives preconcerted control requests when following three typical signals of step, speed and sine wave. The results of actual application show the correctness and satisfied validity of the intelligent PID control algorithm studied in this paper.