模糊工程PID在气动位置伺服中的应用

针对现有高精度气动位置伺服控制算法复杂,难于在工程上实现的问题。提出一种基于调整因子的模糊工程PID控制器,采用归一化加速度参量反映系统响应的快慢,引入变论域的思想构建模糊工程PID控制器的自调整机构。该机构根据系统误差和归一化加速度参量输出调整因子,动态调整基于工程整定法的模糊PID控制器的比例因子,以改变模糊控制器输入输出与模糊子集的映射关系,从而改善模糊控制器的动、静态性能。仿真与试验结果表明,该方法简单且具有良好的控制效果。

Application of Fuzzy Engineering PID Based on Adjustment Factors in Pneumatic Position Servo Control System

The existing algorithm for the high precision pneumatic position servo control is rather complicated,and it is so difficult to apply in engineering.An algorithm of fuzzy engineering PID based on adjustment factors is proposed using the normalized acceleration parameters to reflect the speed of the system response with a self-tuning mechanism for fuzzy engineering PID controller by introducing the variable universe algorithm.The adjustment factor is output according to the system error and normalized acceleration parameters to adjust the scale factor of the fuzzy PID controller and change the mapping relationship between the input and output of the fuzzy controller and fuzzy subset,thus improving the static and dynamic performance of fuzzy controller.The simulation and experimental results show that the algorithm proposed is simple and has a good control performance.