旋转式惯导系统刻度因数误差的分析与补偿

摘要

The effect of scale factor error on the high—precision strapdown inertial navigation system can not be ignored. The scale factor error should be estimate and compensated for clearing up the effect to the gyroscope constant drift. Since the existing model can not be used to compensate the scale factor error, a new model of scale factor error is proposed. The new model makes quick estimate of the scale factor error and the compensation for the single—axis system with rotations at four locations. Simulation results show that the new model is able to estimate the scale factor error and clear up its effect to the gyro constant drift accurately and quickly.%刻度因数误差对高精度捷联惯导系统的影响不容忽视.为了消除刻度因数误差的影响,需要对刻度因数误差进行估计和补偿.由于现有的刻度因数误差模型不能进行补偿,所以提出了一种新的刻度因数误差模型.利用新模型,应用一种快速估计刻度因数误差的方案估计刻度因数误差,并且在单轴四位置旋转方案中对其进行补偿,这样就可以将刻度因数误差的影响消除掉.仿真结果表明,采用新的模型可以精确、快速的估计出刻度因数误差,经过补偿,可以消除刻度因数误差对陀螺漂移造成的影响.