论文部分内容阅读
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。
In order to improve the survivability, rapid response capability and the hit rate of airborne missiles of carrier-based aircraft, the initial alignment of carrier-based aircraft inertial guidance system must be completed quickly and accurately. Due to the complexity of the ship’s environment and the influence of many disturbing factors, the transfer alignment method is usually adopted to solve the initial alignment problem of the carrier-based inertial navigation system. Aiming at the problem of transfer alignment of carrier-based inertial navigation system at large azimuth misalignment, a nonlinear model of velocity and attitude matching transfer alignment is deduced in detail. Then the UKF algorithm is used to carry out mathematical simulation. The simulation results show that the different maneuvering motions of the ships under medium sea conditions have almost no effect on the transfer alignment. The UKF filtering algorithms with different frequencies transmit the alignment errors at 20 Hz, which are twice as small as those at lower frequencies.