一种基于模糊逼近的双容水箱鲁棒控制器设计

A design of coupled tank robust controller based on fuzzy approximation

应用物料平衡原理及状态方程方法建立双容水箱液位动态模型,根据鲁棒控制原理及模糊控制的万能逼近性质设计控制器。在不同初始参数及不确定性干扰条件下,应用MATLAB对水箱系统及所设计控制器进行仿真验证,实验结果表明,与基于传递函数的控制器相比,该控制器在不同条件下均能保持有效的控制效果,且调节时间更短、超调量更小,对系统初值选取不敏感。

A dynamic model of coupled tank liquid level system is abstractly established based on the material balance principle and the state equation,and consequently a controller is designed according to the robust control principle and the universal approximation of fuzzy control.By using MATLAB,the coupled tank system and the controller are simulated respectively with different initial parameters and under disturbances of different uncertainties.Experimental results show that compared with the transfer-function-based controller,the designed controller can remain effective control under different conditions,that it has shorter settling time and smaller magnitude overshoot,and that it is less sensitive to the initial value of the controlled system.