FUZZY-PID在电动跑步机调速单元中的应用

Development of the digital speed-controlling unit for electric running-rigs

针对电动跑步机的脉冲式负载转矩特性,以小功率直流电机驱动为例,利用PHILIPSP87LPC768单片机开发了一种电动跑步机专用的数字式速度调节单元.该调速单元充分利用单片机的资源,采用FUZZY-PID算法,通过对PID参数的自动调整产生PWM信号,实现对跑步机速度的控制.工业化试验结果表明:该单元结构简单,性价比高,能对电动跑步机的速度实现精确控制,同时该方法也可应用于其它同类运动装置的速度控制.

In accordance with the pulse characteristic of the load of the running-rigs which are driven by DC motor with small power,a dedicated digital speed-controlling unit for the electric running-rigs is developed using P87LPC768 MPU.The unit makes full use of MPU resources and FUZZY-PID algorithm,and it generates PWM pulse by automatically adjusting PID parameters in order to realize the speed control of the running-rigs.The results of industrial tests show that the unit has not only simple structure and high performance-to-price ratio but also high control precision to the speed of the running-rigs.And it can also be applied to the speed control of other sport-rigs.