Abstract:Aerospace vehicles have the characteristics of mobility, high speed and real-time attack. In order to ensure the accuracy, reliability and robustness of the navigation system of the aerospace vehicle under various complex flight conditions, a multi-source fault-tolerant robust integrated navigation system including inertial navigation, GNSS and celestial navigation is constructed. A robust multi-sensor information fusion method based on the Huber rule is designed to solve the problem of non-Gaussian measurement noise in nonlinear systems caused by the complex electromagnetic environment in space; The fault diagnosis and isolation strategy are designed for the high dynamic GNSS signal is disturbed, deceived, receiver lost lock and star map is motion-blurred. The simulation results show that the multi-source fault-tolerant robust integrated navigation system can effectively improve the navigation system under complex conditions, and provide an effective reference for the design of the navigation system of aerospace vehicles.