基于超紧耦合GPS/INS的远程火箭弹组合导航方法(英文)

Ultra-tight GPS/INS integration based long-range rocket projectile navigation method

精确导航对远程火箭弹的精准打击具有至关重要的作用。为了获得稳定、高效的导航效果,提出了一种基于GPS/INS超紧耦合的组合导航方法。首先,利用INS短时输出精度高的优势,辅助GPS的信号捕获,然后再将GPS的输出信息同INS的输出信息进行联邦滤波融合。同时,在滤波算法上使用了容积滤波算法,并进行了强跟踪改进,且对联邦滤波的因子分配方法进行了基于矢量分配原理的改进。最后进行了组合导航的仿真。结果表明,基于本文方法的导航精度高于普通紧组合方法的导航精度,这为远程火箭弹的精确导航提供了参考。

Accurate navigation is important for long-range rocket projectile＇s precise striking. To obtain stable and high-per- formance navigation result, a ultra-tight global positioning system/inertial navigation system （GPS/INS） integration based nav- igation approach is proposed. The accurate short-time output of INS is used by GPS receiver to assist in acquisition of signal, and output information of INS and GPS is fused based on federated filter. Meanwhile, the improved cubature Kalman filter with strong tracking ability is chosen to serve as the local filter, and then the federated filter is enhanced based on vector sharing theory. Finally, simulation results show that the navigation accuracy with the proposed method is higher than that with traditional methods. It provides reference for long-range rocket projectile navigation.