舰载机大失准角的快速二次传递对准方法

Rapid second time transfer alignment of large misalignment for carrier aircrafts

针对舰载机传递对准特点,直接利用主惯导的导航信息进行一次装订,引入了大失准角对准问题.为了解决舰载机传递对准问题,提出利用子惯导自主对准进行一次装订减小子惯导中间坐标系与主惯导间的失准角.分析Wahba问题提出统计意义的Quaternion(四元数)对准方法替换传统的Triad(双矢定姿)对准方法,提高了多信息冗余度和对准精度.基于分级修正思想,提出二次传递对准方法,第一次传递基于非线性模型和自适应渐消扩展卡尔曼滤波,并给出简化的渐消因子计算方法;第二次传递对准基于线性误差模型,采用速度+航向匹配,在补偿失准角的基础上,估计陀螺漂移.仿真结果表明二次传递方法能够满足舰载机传递对准需求.

Using the master inertial navigation system（MINS） navigation information,the slave inertial navigation system（SINS） was introduce to solve the large misalignment problem of the carrier aircraft transfer.The self-alignment was adopted before the transfer alignment to reduce the misalignment between the MINS and SINS.Then the Triad alignment method was replaced by statistical Quaternion method based on the solution of Wahba problem,which improved the alignment accuracy and redundancy.Then based on the cascaded calibration method,a second time transfer alignment was presented.The first alignment was based on the nonlinear error model and adaptive fading extended Kalman filter（AFEKF）,and a new method of calculating fading factor was presented.The second alignment based on the linear error model,adopting velocity-yaw matching method not only estimate and compensate the misalignment angles,but also estimated the gyrocompass drift.The simulation results show that this method can satisfy the requirement for the carrier aircraft transfer alignment.