摘要
在现代战争中,精确制导武器承担着越来越重要的角色,对战争进程起着至关重要的作用。由于要实现精确制导、精确打击,首先必须具备精确的导引信息,进而使组合导航成为高精度导航发展的主流方向。
论文建立了发射惯性坐标系中的SINS导航解算模型,推导了该坐标系中的SINS误差传播方程。在此基础上建立了SINS/SAR和SINS/GPS两个子系统的观测方程。
分析了SAR、GPS、SINS导航系统的基本原理及特点,且对三者的导航误差特性进行了分析。
设计了适用于SINS/SAR/GPS组合导航系统的联邦滤波器,以弹道导弹高精度、高可靠性先进组合制导技术研究为背景,设计了弹道导弹再入段轨迹发生器,根据再入段特点对SINS/SAR、SINS/GPS及SINS/SAR/GPS组合导航进行了相关数学仿真、对两个子系统的滤波输出结果进行了信息融合,并对仿真结果进行了比较、分析。结果表明,基于联邦滤波器的SINS/SAR/GPS组合导航系统可以有效地提高系统导航精度,同时可增强系统的可靠性及容错性。
During modern war, accurate homing weapons have become very important for accelerating the modern war finished early, and take on more and more important roles. In order to guide and attack accurately, firstly we have to possess precise homing information. Now, combination navigation technology has become main flow direction for getting accurate navigation information.
In this paper, the mathematics model of SINS in the Launch Inertial Coordinate System is established, and the error propagation function of SINS and measurement functions of SINS/SAR and SINS/GPS are modeled.
The elemental principles and characteristics of SINS, SAR and GPS navigation system are analyzed in the paper.
A sort of federal filter for SINS/SAR/GPS navigation system is designed, according to the advanced integrated guidance technology of high accuracy and high reliability for the ballistic missile, and against the reentry stage trajectory characteristic of the ballistic missile, the reentry ballistic curve for the ballistic missile is designed. and the mathematic simulations based on the federal filter between SINS/SAR、SINS/GPS and SINS/SAR/GPS have be finished. The mathematics simulations results demonstrates that the integrated navigation system's accuracy as well as reliability and fault-tolerant are increased by the mode of integrated SINS/SAR/GPS navigation system based on the federal filter.
引文
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