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提出了一种大失准角情况下的传递对准方法,该方法基于回路对准使子惯导的姿态振荡误差衰减到小角度后进行滤波传递对准,设计了速度加姿态匹配的传递对准滤波模型。与传统传递对准方法相比,该方法无需建立子惯导非线性误差模型,应用经典Kalman滤波即可快速地完成对准。仿真试验表明,在大失准角情况下,子惯导失准角用外部速度可以调平到30′以内,传递对准姿态误差最大为0.5′,方位误差为2′。
A method of transfer alignment is proposed based on a large misalignment angle. The method adjusts the transmission error of attitude of the sub-Inertial guide to a small angle based on the loop alignment, Quasi-filtering model. Compared with the traditional transfer alignment method, this method does not need to establish a nonlinear error model of sub-inertial navigation, and the classical Kalman filter can quickly complete the alignment. The simulation results show that the misalignment angle of sub-INS can be adjusted to within 30 ’with the external velocity at a large misalignment angle, and the maximum of the alignment error is 0.5’ and the azimuth error is 2 ’.