无刷直流电机模糊伺服控制器设计

针对直流无刷电机(BLDC)的数学模型具有较强非线性的特点,文章基于三调节因子模糊控制算法建立了其伺服控制器.与传统伺服控制器相比,为增加控制的平滑性,在模糊伺服控制器的设计中引入了第三个调节因子.将位置误差及其变化量分别作为位置控制器的输入,当位置误差处于不同的等级时采用不同的调节因子.为了验证所设计伺服控制器的有效性,分别对BLDC系统的位置跟踪、转速以及a相电流特性进行了仿真研究.此外,通过与位置环采用普通PI控制器时的位置跟踪特性进行比较,表明所设计的模糊伺服控制器性能较好,从而为无刷电机伺服控制系统的设计、开发与调试提供了一种新途径.

Design of BLDC Fuzzy Servo Control System

In view of the serious nonlinearity of the mathematical model of the brushless direct current motor(BLDC),a BLDC fuzzy servo controller is established based on a three adjustable factor algorithm.The third factor is introduced so as to control smoothly compared to traditional fuzzy controller.The position error and its change rate are the inputs of the position controller.Different factors are used when the position are on different stages.In order to testify the validity of the model,a simulation is made and the curves of position tracking,speed,current are given.Finally a comparison is carried out between the fuzzy position controller and common PI position controller.The result demonstrates that the fuzzy controller is of perfect quality.It provides a new method for the design,development and debugging of the actual motor control system.