陀螺转子质心调整中的爬行机理与改善

Stick-slip Mechanism and Improvement in Centroid Adjustment of Gyro Rotor

为解决陀螺转子质心位置调整过程中的爬行问题,建立了陀螺转子质心调整系统中调整螺纹副的物理模型,并推导出调整系统的动力学表达式,得出影响爬行的因素(扭转刚度、转子所受正压力等);通过在不同扭转刚度和转子所受正压力下进行陀螺转子质心调整实验,验证增大调整螺纹副扭转刚度和减小正压力可有效减小爬行现象。在实验研究的基础上改进陀螺转子质心位置调整设备,实验表明改进后设备可有效减小调整过程中的爬行现象,调整精度可达±0.5μm,提高了陀螺转子质心位置调整的成功率,满足了设计要求。

To solve the stick-slip phenomenon in the adjustment of the centroid position of the gyro rotor,the physical model of adjusting screw pair in the centroid adjustment system of gyro rotor was established;the dynamic expression of the system was derived,the factors affecting the stick-slip were obtained,such as torsional stiffness,the positive pressure of the rotor,etc.By centroid adjustment of gyro rotor under different torsional stiffness and positive pressure,we proved that increasing the torsional stiffness and decreasing the positive pressure could effectively reduce the stick-slip phenomenon.The adjustment device of gyro rotor centroid position was improved based on experimental study.The experimental results show that the improved device can effectively reduce the stick-slip phenomenon in the adjustment process,and the setting accuracy can reach ±0.5μm.The success rate of position adjustment of the gyro rotor centroid is improved,and the design requirements are satisfied.