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捷联安装在弹体上的磁阻传感器在探测地磁矢量的过程中存在探测盲区。在盲区内姿态转换矩阵由于奇异性而造成不可解的现象,对此可借助于GPS测量得到的弹道信息,应用拟牛顿方法来进行姿态解算。通过对实验数据的仿真分析表明:该方法在避开对矩阵求逆运算的同时,能得到与牛顿法相近的收敛速度及求解精度。
Magnetoresistive sensors mounted on missile body strapdown detection blind spot in the process of detecting the geomagnetic vector. Due to the singularity, the attitude transition matrix in the blind area can not be solved. This method can be solved by means of the quasi-Newton method with the aid of the ballistic information obtained by GPS measurement. The simulation analysis of the experimental data shows that this method can get the convergence speed and the accuracy of the solution similar to the Newton method while avoiding the matrix inversion.