Research On Integrated Navigation Technology And Semi-physical Simulation Of Hypersonic Vehicle

Based on the background of hypersonic vehicle, aiming at the application requirements of hypersonic vehicle navigation system's autonomous,high reliability, high precision,this thesis present the theory and simulation reserch of the design of master-slave redundancy INS/GPS/CNS multisensor data fusion integrated navigation system.A semi-physical simulation platform was built based on the theoretical research.With the platform, the periodic experiment was provided. The research is composed by four parts.Firstly, the paper introduced the definition of various applied coordinate systems, deduced the motion equation of hypersonic vehicle, designed flight trajectory in accordance with characteristics of hypersonic vehicle, and concluded the mathematical presentation and Error propagation equation of inertial navigation system.Secondly, redundancy properties of strap-down inertial navigation system were studied, the master-slave redundancy inertial navigation system was designed based on the inertial component parity principle, and the fault diagnosis function in inertial system was realized by parity measurement information processing in the inertial navigation device.Thirdly, the research was taken on the integrated navigation of multi-sensor information fusion. Through the error characteristic analysis of the GPS and CNS, the INS/GPS, INS/CNS kalman filter was designed. The federal filter design was finished in the information distribution principle of inverse method of filtering error variance matrix. Finally, based on the achievement of above studies, a semi-physical simulation platform of integrated navigation system was built, which is constitutive of inertial navigation devices, GPS receiver and some other hardware. Further more, the method performance of integrated navigation was verified and analyzed by the application of the semi-physical simulation platform.