| 摘要: |
| 为了提升正交双加速度计在低精度分度头上的标定精度，设计了二序列组合测试方法，将二序列中同一加速度计的输出进行融合，并采用最小二乘法分离了分度头角位置误差和加速度计的误差，最终消除了分度头角位置误差对加速度计标定精度的影响。在±10″的低精度分度头上设计并开展了实验，经过数据融合处理后，2只加速度计误差模型系数的标定不确定度数量级均达到10-6~10-7，验证了相较于没有分离出角位置误差的传统方法,标定精度提高了1个数量级。该方法可以推广应用于多加速度计的标定中，能提高加速度计在分度头上的标定精度和标定效率。 |
| 关键词: 石英挠性加速度计 分度头 误差分离 误差消融 最小二乘法 |
| DOI： |
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| 基金项目:黑龙江省人力资源和社会保障厅黑龙江博士后面上资助项目（LBH-Z22134） |
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| Calibration of orthogonal dual accelerometers on indexing table |
| XIE Tianyi,ZHANG Chunjing,ZHANG Peihan,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) |
| Abstract: |
| In order to improve the calibration accuracy of orthogonal dual accelerometers on low-precision indexing tables, a two-sequence integrated calibration method is designed to fuse the outputs of the same accelerometer in the two sequences, and the least square method is used to separate the angular position errors of the indexing table from the errors of the accelerometer, which ultimately eliminates the effect of the angular position errors of the indexing table on the calibration accuracy of the accelerometer. Experiments are designed and carried out on the ±10″ low-precision indexing table, after data fusion of two-sequence outputs, the uncertainties of the error model coefficients of the dual accelerometers are within 10-6~10-7, which verifies that the calibration accuracy is improved by an order of magnitude compared with the conventional method without separating the angular position error. The method can be extended to and applied to the calibration of multiple accelerometers, which can simultaneously improve the calibration accuracy and efficiency of accelerometers on the indexing table. |
| Key words: Quartz flexible accelerometer Indexing table Error separating Error counteracting Least square method |
