摘要
可靠性和对故障的可区分性是评价系统完好性的两个重要因素。本文将多GNSS系统与不同精度的INS系统进行组合,由此分析不同因素对组合系统内部的可靠性和故障探测与隔离能力的影响。仿真结果表明,集成多GNSS系统可以改善卫星星座的几何分布结构,从而提高系统的内部可靠性和对故障的区分能力;当GNSS系统与INS系统相结合时,也能大幅度提高系统的可靠性和区分性;相较于低精度的INS系统,采用高精度的INS系统能够进一步提高系统的可靠性,并增强对故障的区分能力。
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.
出处
《测绘学报》
EI
CSCD
北大核心
2014年第8期786-795,共10页
Acta Geodaetica et Cartographica Sinica
基金
国家自然科学基金(61201391)
