Credibility Monitoring Research of BDS Based on LEO/INS
作者单位：Beihang University China Academy of Space Technology
会议名称：《第十四届中国卫星导航年会》
会议日期：2023年
学科分类：08[工学] 080401[工学-精密仪器及机械] 081105[工学-导航、制导与控制] 0804[工学-仪器科学与技术] 0825[工学-航空宇航科学与技术] 0811[工学-控制科学与工程]
摘 要：The reliability of satellites navigation system has always been the focus of international community,the risks of integrity and hostile interference are important factors affecting the reliability of airborne satellites navigation *** satellites with advantages of running in low orbits,having rapid change of satellite geometry and strong anti-interference capability of satellite signal,can significantly enhance the credibility of *** when most or even all satellites are spoofed,LEO satellites and BDS navigation system can hardly detect and recognize ***,we add inertial navigation system as an independent navigation source to the whole system and propose a credibility algorithm based on inertial navigation system,combining INS with all visible satellites to detect and recognize fault satellites in more directions,constructing chi-square test statistics based on the Kalman Filter innovation sequence on the basis of satisfying the need of *** simulation results show that LEO/INS-aided system can detect and recognize fault satellites in more than one *** the indexes of 90% integrity default detection rate and recognition rate,compared with single BDS system,the two indexes of the INS-aided system improve about 20% and 40% *** hostile faults,the LEO satellites can significantly improve the anti-spoofing performance of integrated navigation system,the detection rate increases about 25% and the recognition rate increases more than 30%.