惯性元件的失准角分离技术研究

Error separating technology for misalignment angle measurement of inertial component

摘要:

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.

Abstract:

Aiming at the misalignment angle of gyro and misalignment angle,an easy and high accuracy measurement method of misalignment angle is designed using error separating technology.A definition of misalignment angle is given,and 2-D expression of misalignment angle of inertial component angle is deduced by direction cosine matrix and the characteristics of small angle.The installing error,errors of fixture and the misalignment angle are separated from each other.A simple measurement method of misalignment angle of accelerometer is designed,which can separat the installation error of fixture and misalignment angle of accelerometer.In the measurement of a Hemispherical Resonator Gyro and a misalignment angle of quartz accelerometer,calibration accuracy reached arc seconds level.The correctness of test using separating technology is verified and the measurement accuracy is raised.