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研究了基于“速度+方位角”匹配的弹载捷联惯导系统的传递对准问题。首先介绍了方位角测量偏置产生的原因,以及与方位失准角的关系。推导了主、子惯导方位失准角的计算方法,并对方位失准角估计进行了仿真试验。在此基础上分析建立了传递对准卡尔曼滤波方程,并对弹载捷联惯导系统的传递对准进行了仿真。仿真结果表明,该“速度+方位角”匹配的捷联惯导系统精度控制在0.05°内,能够满足空射制导武器初始对准精度的要求。
The transmission alignment problem of the missile-based SINS based on the “velocity + azimuth” matching is studied. Firstly, the reasons for azimuth measurement offset and the relationship with azimuth misalignment angle are introduced. The calculation method of the misalignment angle of the primary and the sub-inertial navigation is deduced, and the simulation test of the azimuth misalignment estimation is carried out. Based on this, the Kalman filter equations are established and the transmission alignment of the missile-based SINS is simulated. The simulation results show that the accuracy of the SIRS system matched with “velocity + azimuth” is controlled within 0.05 °, and the initial alignment accuracy of air-conducted guidance weapon can be satisfied.