| With the rapid development of aviation and the sustained growth of air traffic, the navigation modelbased on RNP will be the future development trend of civil aviation. To meet the precisionrequirements with RNP navigation mode, the information fusion technology of integrated navigationsystem is studied in this papper; to meet the integrity requirements of RNP navigation mode, theinformation monitoring and management technology of comprehensive navigation system is focusedon in this paper. The above technologies research can improve positioning accuracy and ensure thereliability and integrity of navigation information.The researches in this paper are with the navigation information transfer of the actual flightmanagement system for basis, and with the structure and algorithm of integrated navigationinformation fusion function and integrated navigation information monitoring and managementtechnology in FMS for reference.The research of comprehensive navigation information fusion technology: with the basis of erroranalysis and modeling of airborne navigation sensor, this paper gives a research on the scheme andalgorithm of the atmospheric aided inertial navigation (Baro-INS) system which is the core part ofairborn navigation system, and the simulation results show that the air data system can effectivelycorrect the height information from INS. In addition, the research of the fusion scheme of INS andland-based radio navigation system which is one of the main navigation systems in China’s civilaviation is focused on in this paper focus on, and the fusion schemes with position information andslant distance information based on time-varying noise are established, and from the simulationresults, it can be shown that this fusion method based on time-varying noise optimize the filterparameters and improve the navigation accuracy.In view of the research of the integrated navigation information fusion technology, the navigationsystem information monitoring and management in the airborn avionics system is researched in thispaper. Firstly, the real-time performance monitoring algorithms of satellite/land-based radionavigation sensor are given. It can reject the navigation information from satellite/land-based radiosystem with mutation faults, and reduce unnecessary combination filtering. Meanwhile, thesatellite/land-based radio system autonomous integrity monitoring method based on redundantinformation is presented, and it focuses on the rate of change detection algorithm for graded faults,compared with the traditional fault detection algorithm, this method can effectively reduce test timedelay. Besides, the navigation information management techniques in airborne avionics system is alsoresearched in this paper. Combined with the results of the navigation information real-time performance monitoring and detection test, this skill realize the optimal treament of comprehensivenavigation information with or without faults, and it also ensure the accuracy and improve thereliability of navigation system positioning.In order to ensure the credibility of the navigation information, the navigation system performancereal-time evaluation method is introduced in this paper. With this method, it can be estimated that thereal-time navigation system performance meets the corresponding route accuracy requirement or not,so as to guarantee the safety of the aircraft flight.In order to compensively simulate and real-time and intuitively verify the navigation informationmonitoring and management technology in airborne avionics system, a set of simulation platformbased on PC is established in this paper. On the basis of completing modeling and simulating for eachnavigation system, the function of information fusion, monitoring, management and evaluation isachieved in this platform. With these methods, on the one hand they guarantee high precisionpositioning outputs, on the other hand they improve the integrity and reliability of the integratednavigation system. They have important theoretical value. |
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