水轮机组调节的模糊控制算法研究

Research on the Fuzzy Control Algorithm of Hydraulic System

从提高模糊控制精度出发,提出了一种混合参数自调整模糊PID控制器结构,融合了常规PID控制器和模糊控制 的优点.控制器主要包括了常规PID控制器、增益调整型模糊控制器和直接控制型模糊控制器3个部分,能根据对象参数的 变化合理地调整控制器的参数.叙述了混合参数自调整模糊PID控制器各部分的功能和参数的选择.针对水轮机组控制的 仿真实验表明了该控制策略的有效性,与常规PID控制器的对比结果表明该控制算法能够提高系统的响应速度和鲁棒性.

To improve the control accuracy of fuzzy controller, the paper proposes a kind of hybrid parameter self-tuning fuzzy PID controller in combination with the advantages of conventional PID controller and fuzzy controller. The controller consists of three parts: the conventional PID controller, the gain-tuning fuzzy controller and the direct-action fuzzy controller, and can adjust the controller parameters with the variation of controlled objects. The functions and parameters selection of every part in the hybrid controller are described in detail. The simulation experiment on the control of hydraulic system shows that the hybrid fuzzy PID control method is effective, and the contrastive results with conventional PID controller shows that the control algorithm can improve the response and the robustness of controlled system.