摘要
由于PD型模糊控制器缺少积分项,所以稳态的控制精度不容易得到保证。本文提出了一种保证稳态精度的模糊控制方法以提高传统模糊控制器的稳态控制精度。这种模糊系统能够选择运行一个传统的模糊控制器或者一个积分控制器,当运行积分控制器的时候,此积分控制器与一个稳态输出值的和为控制系统输出。根据不同的状态水平,在传统模糊控制器和稳态值输出之间可以进行平滑的切换。对于PMLM控制系统,当接近稳定状态的时候,保证稳态精度的模糊控制系统的输出是稳态值和变量值这两部分的和。实验结果显示这种保证稳态精度的模糊控制系统比传统的PID控制器和单个传统的模糊控制器在速度控制中可以获得更好的动态和静态性能。
A PD type fuzzy controller has no integral part, so the steady control precision cannot be guaranteed. In this paper, a fuzzy control method that can ensure static precision is proposed to promote the traditional fuzzy controller and is applied to the speed control of a permanent magnet linear motor （PMLM）. The proposed fuzzy system can run a traditional fuzzy controller and an integral controller added by a stable parameter value. According to different state levels the two controllers can switch smoothly. For PMLM control system, the output of speed control using the proposed fuzzy system includes a stable and a changing value when the controlled system is close to stable state. The experimental results show the fuzzy control method that can ensure static precision has a higher performance than a traditional PID and a traditional fuzzy controller in speed control.
出处
《电工技术学报》
EI
CSCD
北大核心
2007年第4期64-68,共5页
Transactions of China Electrotechnical Society
基金
国家自然科学基金资助项目(60474021)。
