Abstract:

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.

Key words: pneumatic position servo system;engineering turning method;fuzzy PID;normalized acceleration;adjustment factors