电器附件测试台运动系统的实现与分析

The Implementation and Analysis of Transmission System Based on Electrical Accessories Test Bench

设计了以步进电机带动丝杆传动机构为主要部件的电器附件测试台,以测试台高速运动性能为研究对象,针对电器附件测试时机械应力负载大小的变化,对丝杆传动的负荷转矩以及步进电机的运动特性进行了全面的分析。采用直线规律和二次函数规律相结合的方法来拟合电机速度的变化曲线,用单片机改变发送脉冲频率来实现步进电机的加减速控制。结果说明,通过合理地控制步进电机速度变化规律可以缩短步进电机的加减速时间,避免了步进电机的丢歩或过冲问题,充分发挥出步进电机的工作性能。

In this paper, an electrical accessory test bench is designed as the main component of a stepping motor driven screw mechanism. Performance of high-speed movement of the test bench is taken as study object. Electrical accessory test load change is studied. Load torque of screw transmission and the movement characteristics of stepping motor are analyzed. A method combining linear law and quadratic function law is used to fit motor speed variation Transmitted pulse frequency is changed to realize the acceleration and deceleration control of stepping motor. Results show that control speed variation of stepping motor properly may shorten acceleration and deceleration time of stepping motor, avoiding step missing or overshooting problems, and getting the most of stepping motor.