一种基于角振动台的SINS加速度计通道频率特性测试方法

摘要

提出一种针对SINS加速度计通道的频率特性测试方法。该方法基于角振动台的正弦摇摆运动，利用加速度计的外杆臂效应实现对加速度计通道的率特性测试。该方法的关键在于加速度计的外杆臂参数标定和杆臂效应误差补偿计算，采用该文章提出的频率内标定方法以及双子样补偿计算公式，能很好地解决这些问题。通过理论分析和实验数据处理表明，该方法能够实现加速度计通道的频率特性测试，测试精度主要取决于外杆臂长度的标定精度。该方法操作方便，具有一定的参考价值。%In view of the accelerator channels in SINS, a test method for their frequency characteristics is proposed. Based on the rolling motion generated by angular vibration table, this method can complete the frequency characteristic test of accelerator channels by using outer lever arm effects of the accelerator. The calibration and compensation of outer lever arm are key to this method. By using the frequency-domain calibration method and the two-sample iteration algorithm proposed in this paper, these key problems can be perfectly solved. Theory analysis and experiment data processing show that this method can realize the frequency characteristic test of accelerometer channels, in which the precision of frequency characteristic test lie on the calibration accuracy of outer lever arm length. The method is easy to operate and has reference value.