Research On FDIR Framework In Satellite Integrated Electronic System And Fault Detection And Isolation Mechanism Implementation

Satellite technology is an important symbol of a country's comprehensive national strength and related to the country's economic development and national security. Many countries have been competing to develop satellite technology, and lots of satellites have been launched. Along with the increasing launched satellites, the safe operation of the satellite has been seriously challenged. The integrated electronic system is an important part of the satellite, and its safe operation is related to the security of the entire satellite. Therefore, the research on Fault Detetion Isolation and Recovery (FDIR) of the satellite integrated electronic system has become vitally important.For the traditional satellite without integrated platform, the FDIR designer makes a specific design for satellites of the same architecture, and FDIR design is not easy to reuse for satellites of different architectures. In addition, application programs such as FDIR software need to access various electronic devices of the satellite's integrated electronic system via the electronic devices'special drivers. All this is neither conducive to FDIR software to make information fusion of integrated electronic system nor conductive to parallel development of hardware and software. Hence the cycles to development satellites have been extended.In order to solve the problems with the satellite FDIR, this thesis first analyzes various types of fault detection, fault isolation and fault recovery techniques and methods. Then various methods are compared to discusse advantages and disadvantages, and more common and effective methods and mechanisms are selected. Furthermore, Satellite Data Model (SDM) is analyzed in terms of the SDM form, SDM operation mechanism, xTEDS forms, grammar, and the mechanism of data releasing and receiving of the based-on SDM platform integrated electronic system. Then, based on the research of SDM and FDIR techniques, the thesis explores the design of an expansive, general and reusable, and SDM platform-based Satellite Integrated Electronic System's FDIR Framework (SIES-FDIRF). The satellite integrated electronic system based on the SDM platform can be propitious to information access and information processing for FDIR software. SIES-FDIRF includes fault detection module, fault isolation module, D-R medium module, fault recovery module, fault database and so on. The major function of fault detection module is to discover fault. And the major function of fault isolation module is fault location. Besides, the main function of D-R medium module is to give fast fault strategies for corresponding fault types. Then, the major function of fault recovery module is to make the system to resume from the fault. The fault database is mainly used to store fault information, network information, data sheets, Bayesian network information and so on. Finally, several more common methods of fault detection and fault isolation(including Bayesian network, limit detection, Kalman filter, based on model method and so on) is selected based on the FDIR framework to implement the fault detection module and fault isolation module. The solar power system, which belongs to integrated electronic system, is chosen as the case of fault diagnosis to prove the feasibility and effectiveness of SIES-FDIRF.This work has laid a good foundation for further research of our research group.