Research On SINS/SAR/GPS Integrated Navigation System

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.