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针对陀螺仪和加速度计存在失准角的问题,采取误差分离技术,设计了简单、高精度测试失准角的方法.对失准角进行了定义,利用方向余弦阵的基本性质,从小角度的原理推导了惯性元件失准角的二维分解表达式,在测量陀螺仪的失准角时,对安装误差、夹具误差和失准角误差进行了误差分离.针对加速度计失准角的测试,设计了简易的测试方法,有效分离了加速度计的失准角以及夹具体的安装误差.对一个半球谐振陀螺仪和一个石英加速度计的失准角进行了实测,标定精度达到角秒级,验证了采用误差分离技术的测试方案的正确性,提高了失准角测试精度.
Aiming at the problem of misalignment angle of gyroscope and accelerometer, the error separation technique is used to design a simple and accurate method to test the misalignment angle.A definition of misalignment angle is made by using the basic properties of directional cosine array, The two-dimensional decomposition expression of the misalignment angle of the inertial element is deduced. The error of the mounting error, the jig error and the misalignment angle error are separated when measuring the misalignment of the gyroscope.Aiming at the test of the accelerometer misalignment angle, A simple test method is designed to effectively separate the misalignment angle of the accelerometer and the installation error of the clamp body.A misalignment angle between a hemispherical resonator gyro and a quartz accelerometer is measured and the calibration accuracy reaches the angular second order The correctness of the test scheme using the error separation technique improves the test accuracy of the misalignment angle.