模糊自整定PID在中空吹塑型坯壁厚控制中的应用

Application of fuzzy self-tuning PID in wall thickness control of blow molding parison

壁厚控制是中空吹塑成型系统的核心,为协调壁厚控制中较快响应速度和较高位置精度之间的矛盾,将模糊自整定PID的控制策略运用其中,建立壁厚控制系统的数学模型,使用Matlab进行仿真,结果表明:控制系统的响应速度和位置精度相对传统PID控制显著提高,具有较高的静态精度和动态品质.

Wall thickness control is the core of hollow blow molding system. Fuzzy self-tuning PID control strategies are used to resolve the contradiction between rapid response speed and high position accuracy of wall thickness control system in this paper. The mathematical model of wall thickness control system is established. Simulation results show that the response speed and position accuracy of the control system relative to traditional PID control is significantly improved with high static precision and dynamic quality by using Matlab.