经编机电子横移系统高速响应性的影响因素

Influencing factors on high speed of electronic shogging system in warp knitting machines

针对高速经编机电子横移控制系统高速响应性不佳的问题,根据经编机梳栉横移的运动要求,搭建了一套梳栉横移运动响应性的测试平台。通过测试电子横移系统中伺服惯量比、电动机选型(如电动机功率、磁极对数等)等参数改变后,横移伺服电动机的实际运动曲线与控制系统指令曲线,分析这些因素变化对电子横移控制系统高速性能的影响。结果表明:电子横移系统的伺服惯量比参数设置应与实际的负载情况相吻合,否则会导致横移时梳栉振荡、或运动刚性不足,影响横移精度;伺服电动机选型应考虑磁极对数与功率大小,增加伺服电动机的磁极对数可大大提升系统的响应性,而电动机功率的选择以够用为宜,增大电动机功率无助于系统响应性的提高。

The high-speed response of electronic shogging system in high-speed warp knitting machines is generally poor.According to the motion requirements of warp knitting machine guide bar,this research built a set of test platforms for the response of guide bar motion.Parameters such as servo inertia ratio,motor selection(such as motor power,magnetic pole pairs,and so on)of the electronic shogging system were experimented on to analyze the actual motion curve of the shogging servo motor and the control system command curve against the parameter variations.The experimental results show that the servo inertia ratio parameter setting of the electronic traverse system should be consistent with the actual load,otherwise it will cause comb bar oscillation during traverse,or insufficient motion rigidity,affecting the traverse accuracy.The selection of servo motor should consider the number of pole pairs and the motor power.Increasing the number of pole pairs of the servo motor can greatly improve the responsiveness of the system,and increasing the power of the motor does not contribute to the improvement of system responsiveness.