摆式积分陀螺加速度计浮子组件微量惯性积的精确测量与补偿。,Sensors

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摆式积分陀螺加速度计浮子组件微量惯性积的精确测量与补偿。
Sensors ( IF 3.4 ) Pub Date : 2023-02-01 , DOI: 10.3390/s23031564
Xiaojun Zhou _{1,

2} , Gongliu Yang ₁ , Wentao Niu ₂ , Yongqiang Tu ₁

Affiliation

摆式积分陀螺加速度计(PIGA)在改进过程中，非线性误差已成为制约其测量精度的最关键因素。PIGA非线性误差抑制的关键是浮子组件微量惯性积(MPOI)的精确测量和补偿。然而，现有的惯性积（POI）测量和补偿设备和程序不满足MPOI的精度要求。为了解决这个问题，提出了用于 MPOI 测量和补偿的新型设备和程序。所提出的测量方法的原理是通过使用单轴转台使浮子组件沿偏心轴旋转以产生因 MPOI 而产生的离心力矩，从而在 PIGA 中模拟 MPOI 产生的误差。所提出的补偿方法的原理是去除不对称质量以将 MPOI 降低到零。通过实验验证，得出以下结论：（1）所提方法的测量精度和补偿精度分别优于1×10-10 kg·m2和3×10-10 kg·m2；(2) 所提出的方法得到验证，对于 PIGA 中的真实浮子组件，MPOI 从 7.3 × 10-9 kg·m2 降低到 3 × 10-10 kg·m2，并且 PIGA 的二次误差从 10- 5/g0 至 3 × 10-7/g0。

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Precise Measurement and Compensation of the Micro Product of Inertia for Float Assembly in Pendulous Integrating Gyroscopic Accelerometers.

Nonlinear error has become the most critical factor restricting the measurement accuracy of pendulous integrating gyroscopic accelerometers (PIGA) during their improvement. The key to nonlinear error suppression for PIGA is the precise measurement and compensation of the micro product of inertia (MPOI) of the float assembly. However, the existing equipment and procedure for product of inertia (POI) measurement and compensation do not meet the accuracy requirements for MPOI. To solve this problem, novel equipment and procedures are proposed for the measurement and compensation of MPOI. The principle of the proposed measurement method is to simulate the error produced by MPOI in PIGA by using a single-axis turntable to rotate the float assembly along the eccentric axis to generate a centrifugal moment due to MPOI. The principle of the proposed compensation method is to remove the asymmetric mass to reduce the MPOI to zero. Through experimental validation, it is concluded that: (1) the measurement and compensation accuracy of the proposed method are better than 1 × 10-10 kg·m2 and 3 × 10-10 kg·m2, respectively; (2) the proposed method is validated as the MPOI is reduced from 7.3 × 10-9 kg·m2 to 3 × 10-10 kg·m2 for a real float assembly in PIGA, and the quadratic error of PIGA is reduced from 10-5/g0 to 3 × 10-7/g0.

更新日期：2023-02-01

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