Research Of The Moving-felt Platform Control System

The moving-felt film integrates machine, computer control, movie, acoustics technology and presents the spectator enjoying the moving-felt film the impression personally on the scene, the moving-felt platform simulating all kinds of moving scenes according to the moving film. How to realize response speed and result of the system of the platform equal to scene, become the difficult point of this control system. So this paper adopted a high performance AC servo technology as the control means.This paper analyzes composition and structure of the moving-felt platform, introduces operation principle and the working course of the moving-felt platform and system, have set up the AC servo system model of the moving-felt platform. The high performance digital AC position servo system discussed in this paper includes three closed loops. The current loop and velocity loop are based on Stone GS motor and its driver. The position loop is based on digital controller that receives the position feedback signal from the load.In the base of theoretically analysis this paper, it has the mathematical model of the PMSM and the current loop and the velocity loop and the position loop. Though the concept of the mathematical model analyzed is comparatively clear, it can not receive the accurate mathematical model, and the mathematical model parameter is very difficult. So this paper presents a new method - Experimentally Analysis Method to analyze mathematic model of the AC servo system. Then by relating to the conventional PID control theory and Fuzzy control theory, Fuzzy Self-adaptive PID algorithm is proposed in position controller to improve further the performance of the system. Then simulation to the system by MATLAB is carried and the control effect of the fuzzy control arithmetic is assured. Through the design of the hardware and the software of the system, it realized the fuzzy control of the AC servo system.By means of simulation and experiment comparison of the two control strategies, the paper expounded that properties of the system adopted Fuzzy self-adaptive PID control are improved and the adaptability of parameter change is enhanced.