Acta Geodaetica et Cartographica Sinica ›› 2014, Vol. 43 ›› Issue (8): 786-795.

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Autonomous Integrity Monitoring of Tightly Coupled GNSS/INS Navigation System

  

  • Received:2014-03-18 Revised:2014-04-11 Online:2014-08-20 Published:2014-08-27

Abstract:

Reliability and separability are two crucial indicators to assess the performance of system integrity. In this paper, the system reliability and Fault Detection and Isolation (FDI) capability were analyzed upon multi-constellation GNSS navigation system and GNSS/INS integrated navigation system. Simulation results show that by fusing multi-constellation GNSS systems, the satellite geometric strength is largely enhanced so as to improve the system internal reliability and the capability of FDI. Besides, the system reliability and separability are further improved by integrating GNSS and INS. The higher the accuracy of the inertial sensors, the better the system performance in terms of reliability and ability of FDI.

Key words: GNSS/INS, integrity, FDI, reliability, separability

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