The Research Of Integrated Navigation Systems Based On Information Fusion

Information fusion technology is a hot research field since 1980. According to the demand on navigation system, several key technologies are discussed in this thesis.Firstly, the function model of information fusion is established; the application and implementation of information fusion used in integrated navigation system is also given here. Then the theory, as well as algorithm of federated filtering is introduced and the optimal estimation is proved systematically. Afterwards, fault-tolerant, fault diagnosis, isolation, system reconstruction of integrated navigation system are researched; Their characteristics and application field are presented. On this basis, SINS/GPS/Double Stars integrated navigation system is analyzed with information fusion; the model and the simulation are proposed, too. Simulation results show that the integrated navigation system with information fusion has a better performance. Moreover, from the prospect of information fusion and integrated navigation technology, intelligent integrated navigation with information fusion system is introduced; integrated navigation scheme based on neural network is established. Finally, according to the information fusion filtering technology and intelligent fault diagnosis technologies, intelligent integrated navigation system's composition, function, implementation and application are discussed. In this thesis, the theory of integrated navigation system is enriched; some conclusions are good references for the practical uses.