基于动不平衡补偿的加速度计二次项系数的精确标定方法  

The accurate calibration method for the second-order coefficients of accelerometers based on dynamic imbalance compensation

作　　者：李巍[1] 李大庆 汤莉[2] 刘逸康 LI Wei;LI Daqing;TANG Li;LIU Yikang(College of Automation Engineering,Harbin University of Science and Technology,Harbin 150080,China;Beijing Institute of Aerospace Control Devices,Beijing 100854,China;Space Control and Inertial Technology Research Center,Harbin Institute of Technology,Harbin 150001,China)

机构地区：[1]哈尔滨理工大学自动化学院,哈尔滨150080 [2]北京航天控制仪器研究所,北京100854 [3]哈尔滨工业大学空间控制与惯性技术研究中心,哈尔滨150001

出　　处：《中国惯性技术学报》2025年第3期293-300,共8页Journal of Chinese Inertial Technology

基　　金：黑龙江省自然科学基金(F2016027)。

摘　　要：针对精密离心机标定加速度计时其动不平衡误差将引入虚假二次项,导致加速度计二次项系数标定精度差,提出了一种基于动不平衡补偿的加速度计二次项系数精确标定方法。通过对称安装两只参考加速度计作为桥梁,提出轮询调度法和动不平衡误差实时补偿技术,分离并抑制了离心机动不平衡误差对测试加速度计标定精度的影响,显著提升了二次项系数的标定准确性。参考加速度计表现出较稳定的不确定度,验证了其作为动不平衡实验基准器件的可行性。仿真结果表明,所提方法将加速度计二次项系数标定不确定度由2.59×10^(-6) g/g^(2)降低至5.83×10^(-8) g/g^(2),为高精度加速度计标定提供了技术支持和理论依据。Aiming at the problem that the dynamic imbalance error introduces the pseudo second-order term during the accelerometer calibrated by precision centrifuge,which will lead to poor calibration accuracy of the accelerometer,an accurate calibration method for the second-order coefficient of the accelerometer based on dynamic imbalance compensation is proposed.By symmetrically installing two reference accelerometers as a bridge,the Round-Robin scheduling method and the real-time compensation technique for dynamic imbalance error are proposed to separate and suppress the influence of centrifuge dynamic imbalance error on the calibration accuracy of the test accelerometers,which significantly improves the calibration accuracy of the second-order coefficients.The reference accelerometer exhibits a more stable uncertainty,which verifies its feasibility as a reference device for dynamic imbalance experiments.Simulation results show that the proposed method reduces the calibration uncertainty of the accelerometer second-order coefficient from 2.59×10~(-6) g/g~2 to 5.83×10~(-8) g/g~2,which provides technical support and theoretical basis for high-precision accelerometer calibration.

关 键 词：精密离心机 动不平衡 加速度计 二次项系数 不确定度分析 

分 类 号：U666.1[交通运输工程—船舶及航道工程]