用于减小框架轴摩擦力矩的电磁式振动器

Electromagnetic Vibration Starter for Decreasing Frictional Torque on Gimbal Axis

研究了一种安装于机电式陀螺仪框架轴上、用于减小摩擦力矩的电磁式振动器.基于步进电机的原理,给出了电磁式振动器步距角的计算方法.实验证明,该电磁式振动器的步距角在100.mA脉冲下的平均值为0.75°,与设计值基本吻合.通过减小摩擦力矩,可以使陀螺仪的零位电流从30.mA降低至1.mA以下.应用电磁振动器能有效减小陀螺仪输出轴上的摩擦力矩.

An electromagnetic vibration starter for decreasing frictional torque, which is mounted on the gimbal axis of gyroscope, was investigated. Based on the working principle of stepping motor, a method for calculating step angle was presented. Experimental results showed that the average step angle of the electromagnetic vibration starter was 0.75 when current pulse was 100 mA, which matched well with the designed value. By decreasing the frictional torque, the zero current of the gyroscope can be reduced from 30 mA to 1 mA or less. The electromagnetic vibration starter can effectively reduce the frictional torque of gyroscope output shaft.