大方位失准角下舰载机传递对准技术

Transfer alignment of carrier-born aircraft under large azimuth misalignment angle

为了提高舰载机的生存能力、快速反应能力以及机载导弹的命中率,必须快速准确地完成舰载机惯导系统的初始对准。由于舰船所处的环境比较复杂而且受到诸多干扰因素的影响,通常采用传递对准方法来解决舰载机惯导系统的初始对准问题。针对大方位失准角下舰载机惯导系统的传递对准问题,详细推导了速度加姿态匹配传递对准的非线性模型,然后采用UKF滤波算法进行数学仿真。仿真结果表明,舰船在中等海况下的不同机动运动对传递对准基本没有影响;采用不同频率的UKF滤波算法,则在20 Hz时传递对准误差较低频时小一倍。

To improve the carrier-born aircraft’s viability and the shooting percentage of airborne missile,the initial alignment of INS in carrier-born aircraft must be finished accurately and quickly.The transfer alignment is always used to solve the problem of initial alignment due to the influence of complex marine environment and many interference factors.In this paper,the transfer alignment of large azimuth misalignment was studied,and the nonlinear error model of velocity plus attitude matching was established.Then the transfer alignment algorithm of large azimuth misalignment based on the UKF was designed.The simulation results show that the maneuver manners make no difference on transfer alignment of carrier-born aircraft in moderate sea state,and by using different filter frequencies of UKF,the transfer misalignment error at 20 Hz is about half of that at a lower frequency.