海基JPALS系统完好性技术分析

Analysis of Integrity Monitoring Technology for SB-JPALS

SB-JPALS是联合精密进近与着陆系统(JPALS)中的一种重要应用,用于支持飞机的全自动着舰。为保障系统的完好性性能,SB-JPALS在舰载端通过一系列监测算法对包括卫星钟、卫星星历、电离层、对流层、多径和接收机故障等故障源进行分类监视。同时充分考虑了舰艇运动、载体形变对完好性监测的影响,在舰面端和机载端引入惯性导航系统对完好性监测性能进行辅助和提升。本文主要针对卫星导航着舰的高精度和高完好性性能要求以及着舰特殊的应用环境,对SB-JPALS系统的完好性技术开展研究,分析其体系结构及实现方法。

SB-JPALS is the important application of the Joint Precision Approach and Landing System (JPALS) which support the autonomous landing of aircraft. For ensuring the integrity of the system, a series of ship-based monitoring algorithms are introduced which achieve the monitor of the satellite clock, satellite ephemeris, ionosphere, troposphere, multi-path and receiver fault.Meanwhile, due to the motion and deformation of aircraft carrier, the inertial navigation system is used on ship and aircraft simultaneously to promote and aid the integrity monitoring performance. Aimed at the high precision and integrity performance requirement of satellite navigation carrier landing and the special application environment of carrier landing, the integrity technology of SB-JPALS is studied, the architecture and implementation method are analyzed in this paper.