变论域自适应模糊PID控制系统仿真与应用

由于电液伺服系统具有非线性、时滞性等问题，自适应模糊PID控制方式仍难以精确控制马达转速，故设计了变论域自适应模糊PID控制算法。通过设计合适的伸缩因子，将变论域与自适应模糊PID控制相结合，该算法可以精确控制电磁比例阀的流量进而控制马达的转速。将PID控制、模糊控制、自适应模糊PID控制和变论域自适应模糊PID控制算法进行Matlab仿真，结果表明：变论域自适应模糊PID控制具有响应快、无超调、稳态误差基本为零的特点。通过可编程控制器实现了模糊PID控制与变论域自适应模糊PID控制算法在电液伺服系统中的应用，实验数据表明，变论域自适应模糊PID控制更加精确，符合工业控制要求。

Simulation and Application of Variable Universe Adaptive Fuzzy-PID Control System

Because of the nonlinearity and time-delay of electro-hydraulic servo system,the adaptive fuzzy-PID control method is difficult to control the motor speed accurately.Therefore,the variable universe adaptive fuzzy-PID control algorithm is designed.By designing the appropriate scale factor,the variable universe was combined with the adaptive fuzzy PID control,which can accurately control the flow of the electromagnetic proportional valve and the speed of the motor.The PID control,fuzzy control,adaptive fuzzy-PID control and variable universe adaptive fuzzy PID control algorithm were simulated by Matlab.The results show that variable universe adaptive fuzzy-PID control has the characteristics of fast response,no overshoot and zero steady-state error.The application of adaptive fuzzy-PID control and variable universe adaptive fuzzy-PID control algorithm in electro-hydraulic servo system is realized by programmable controller.Experimental data show that the variable universe adaptive fuzzy-PID controls is more accurate and meet the requirements of industrial control duty.