永磁电机的力矩波动对舵机修正精度的影响

Effect of Permanent Magnet Motor Torque Fluctuation on Steering Gear Correction Accuracy

依据弹道修正基本原理,对弹道修正基本流程进行设计。通过查阅相关资料,对弹道修正机构中的舵机所受力矩进行分析。通过对修正弹进行气动仿真,可知永磁电机的力矩波动会使舵机在目标停止位置出现摆动,使永磁电机对舵机的控制精度降低。又对影响永磁电机力矩波动的因素进行分析,可知减小硅钢片槽口宽度和采用磁极偏移可以减小永磁电机的力矩波动。结果表明,为了提高舵机的修正精度,必须要减小永磁电机的力矩波动。

Based on the basic principles oI trajecto- ry correction, a basic process to carry out trajectory correction is designed. After a review of relevant data, the steering gear of trajectory correction mechanism by torque is analyzed. Through simulations of the correct projectile aerodynamics, it is concluded that the per- manent magnet motor torque fluctuation will appear in the position of steering gear in the target to stop oscil- lating and the controlled precision of the permanent magnet motor control of the steering gear will de- crease. After analyzing the influencing factors of per- manent magnet motor torque fluctuation, it is conclu- ded that reducing the silicon the pole shift can reduce the steel sheet slit width and permanent magnet motor torque fluctuation. The results show that in order to improve the correction precision of steering gear, the permanent magnet motor torque fluctuation must be reduced.