New Approach to GPS Integrity Monitoring Based on SINS
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摘要: 以车比雪夫大数定律为基础,研究基于捷联惯导系统(SINS)的全球卫星定位系统(GPS)完善性监测方法.采用一个卡尔曼滤波器滤波,对卫星伪距故障幅值进行估计并判断哪颗卫星出现故障.最后给出了卫星出现阶跃故障的仿真实例.仿真结果表明,该方法能够及时准确地检测出GPS信号故障,计算量较低,适合于工程上应用.Abstract: A new approach of GPS integrity based on SINS is studied by means of the Chebyshev-s law of great numbers. The magnitude of pseudoranges can be estimated and that which satellite is in trouble can be determined by using only a Kalman filter. A example is given in the case of step-type pseudorange error. Thesimulation result proves that the new approach is very practical and efficient and the computation load is lower.
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Key words:
- strapdown inertial navigation /
- satellite navigation /
- fault detection
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[1] Sturza M A. Navigation system integrity monitoring using redundant measurements[J]. Navigation:Journal of the Institute of Navigation, 1988-1989,35(4):483~501. [2] Da R, Lin C F. A new failure detection approach and its application to GPS autonomous integrity monitoring[J]. IEEE Transactions on Aerospace System and Electronic Systems,1995,31(1):499~506. [3] Da R, Lin C F. Failure detection and isolation structure for global positioning system autonomous integrity monitoring[J]. Journal of Guidance, Control, and Dynamics, 1995,18(2):291~297. [4] 颜 东, 张洪钺. INS/GPS组合导航系统故障检测问题研究[J]. 航空学报, 1996,17(2):239~242. -
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