基于最小二乘的接收机自主完好性检测(RAIM)在卫星数增多时对于单颗卫星不变的故障性能出现下降。文章首先对该问题进行了分析,然后应用矢量正交算法提出了一种新的故障敏感矢量算法,该算法避免RAIM在卫星数增多时故障检测量中故障信息恒定时故障检测性能出现下降的问题,而是性能有所增强,而且该算法同时完成故障的定位。 Receiver Autonomous Integrity Detection (RAIM) based on least squares reduces the fault performance of a single satellite when the number of satellites increases. The paper first analyzes the problem and then proposes a new fault-sensitive vector algorithm by using vector orthogonal algorithm. This algorithm avoids the problem that the performance of fault detection declines when the number of the fault detection is constant in the RAIM when the number of satellites increases , But the performance has been enhanced, and the algorithm to complete the fault location.