离心机主轴动不平衡引入PIGA标定的虚假二次项误差机理  

The mechanism of PIGA s pseudo-second-order term generated by spindle dynamic imbalance of centrifuge

作　　者：刘逸康 张春京[2] 贺栋 于志伟[1] 任顺清[1] LIU Yikang;ZHANG Chunjing;HE Dong;YU Zhiwei;REN Shunqing(Space Control and Inertial Technology Research Center,Harbin Institute of Technology,Harbin 150080,China;Beijing Institute of Aerospace Control Devices,Beijing 100854,China)

机构地区：[1]哈尔滨工业大学空间控制与惯性技术研究中心,哈尔滨150080 [2]北京航天控制仪器研究所,北京100854

出　　处：《导航定位与授时》2025年第1期137-144,共8页Navigation Positioning and Timing

摘　　要：为了提高摆式积分陀螺加速度计在精密离心机上的标定精度,针对单轴式精密离心机主轴回转过程中动不平衡引入的一次谐波运动对加速度计标定的误差机理进行了研究。首先,分析了主轴一次谐波误差的来源,在此基础上,通过建立坐标系并进行误差传递,推导了包含一次谐波误差的加速度计输入输出方程。然后,对该方程进行分析,揭示了一次谐波误差引入加速度计虚假二次项误差的机理。最后,利用高精度测微仪监测了离心机的一次谐波运动,以补偿虚假二次项误差,使动不平衡误差对二次项系数标定误差的影响程度从10-6 rad/(s·g^(2))降到10^(-8) rad/(s·g^(2))量级。In order to improve the calibration accuracy of the pendulous integrating gyroscopic accelerometer on the precision centrifuge,the mechanism of the effect of the first harmonic motion induced by the dynamic imbalance during the rotation of the single-axis precision centrifuge spindle on the calibration accuracy of the accelerometer is studied.First,the principle of the first harmonic error within the spindle rotation is analyzed.Then,based on this analysis,coordinate systems are developed to propagate the errors,thus deriving the input-output model for the accelerometer including the first harmonic errors.Analysis of this model reveals the mechanism by which the first harmonic errors introduce the pseudo-second-order term into the accelerometer.Finally,the first harmonic motion of the centrifuge spindle is monitored using a high precision micrometer to compensate for the pseudo-second-order term and reduce its effect on the second-order coefficient from 10^(-6) rad/(s·g^(2))to 10-8 rad/(s·g^(2)).

关 键 词：精密离心机 动平衡 摆式积分陀螺加速度计 二次项系数 标定 

分 类 号：V249.32[航空宇航科学与技术—飞行器设计]