速度匹配算法在传递对准中的应用分析

理论上，载机机动对提升速度匹配传递对准滤波器的性能是有益的，但机动同时会带来较大的机翼动态挠曲变形角，这一过程对传递对准又是不利的。为了分析机动对速度匹配传递对准过程的影响，首先给出了考虑机翼柔性变形时主子惯导之间的失准角模型,并采用二阶Markov过程来表示机翼动态挠曲变形角。其次，给出了在动态挠曲变形的影响下,杆臂速度与杆臂加速度的表达式。然后，推导出了本文使用速度匹配算法的误差评估方法。最后，结合提出的相关模型,对机动条件下速度匹配算法的性能进行仿真分析。结果表明，在机翼动态挠曲变形角标准差达到20′时，滤波器出现明显的发散现象，因此速度匹配算法在应用时，应充分考虑机动带来的动态挠曲变形角所产生的影响，合理选择机动大小或武器挂点。

Application analysis of velocity matching algorithm in transfer alignment

In theory, the carrier maneuver is beneficial to improve the performance of the velocity matching transfer alignment filter, but the maneuver will also bring large wing dynamic flexure deflection angle, which is unfavorable to transfer alignment. In order to analyze the effect of maneuver on velocity macthing transfer alignment process, firstly, the model of the misalignment angle between the primary inertial navigation system (INS) and sub INS considering the flexible deformation of the wing is given, and the dynamic flexure deformation angle is represented using the second-order Markov process. Secondly, the expressions of the lever arm velocity and acceleration under the influence of the dynamic flexure deformation are given. Then, the error eva-luation method with the velocity matching algorithm is derived. Finally, the performance of the velocity match-ing algorithm under maneuvering conditions is simulated and analyzed based on the proposed relevant model. The results show that the filter appears obvious divergence phenomenon when the standard deviation of wing dynamic flexure deformation angle reaches 20′. Therefore, the influence of dynamic flexure deformation angle caused by maneuver should be fully considered, and the maneuver size or weapon attachment point should be reasonably selected in the application of velocity matching algorithm.