位标器陀螺转轴静平衡测试系统设计

为了对位标器陀螺转轴的静不平衡量及其分布的角位置进行测试，研制了一种位标器陀螺转轴静平衡测试系统.该系统通过调整夹具的方向使得位标器的被测轴与转台水平轴平行安装，测控系统驱动转台依次转至预先设定的36个锁定角位置处，在每个锁定角位置处，由伺服控制信号锁定位标器的两个轴后，驱动另外一个被测轴进行正弦小角度转动，通过对被测轴驱动电流测量量的多周期积分就可以得出被测轴此时的静不平衡力矩.转台顺次转过一周后，通过对被测轴所测36个静不平衡力矩及转台锁定角度的最小二乘拟合，可以确定出被测轴的静不平衡量大小及其分布的角位置.最后进行了加载实验及其重复性测试实验，结果表明该测试系统重复测量的静不平衡量测试精度能达到±0.25 mN·m，角位置测试精度能达到±2°，具有较高的测试精度. 

Design of static balance testing system for coordinator gyro rotation axis

A static balance testing system for coordinator gyro rotation axis was desired to do a test about the static unbalance value and distributed position angle. In this system, the measured axis of the coordinator gyro was mounted parallel with the horizontal turntable axis by the direction of the fixture. Measurement and control system drove the turntable turned to 36 lock horns, which was set in advance. Then in every lock angular position, two axes of the coordinator were locked with the servo control signals, and another measured axis was drove to rotate with sine small-angle in the same time. The static unbalance moment was calculated with the multi-cycle integration of the driving current amount. After a round rotation, 36 position values were measured, which were then used to deduce the static unbalance value and the distribution of angular position with least-squares fitting method. Loading test was carried out repeatability. According to the result, the static unbalance measurement precision can reach ±0.25 mN·m and the angular position measurement precision can reach ±2°, which shows that the system has a good performance.