航向姿态参考系统磁航向误差偏大故障分析  

Failure Analysis on Magnetic Heading Error of AHRS

作　　者：薛永生 宋立廷 XUE Yongsheng;SONG Liting(Major Special Equipment Project Management Center,PLA Navy Equipment Department,Beijing 100071,China;Control and Engineering Department,Qingdao Branch,Naval Aviation University,Qingdao 266041,China)

机构地区：[1]中国人民解放军海军装备部重大专项装备项目管理中心,北京100071 [2]海军航空大学青岛校区控制科学与工程系,青岛266041

出　　处：《航空工程进展》2021年第6期142-146,共5页Advances in Aeronautical Science and Engineering

摘　　要：航向姿态参考系统是飞机上用于测量、计算和提供飞行姿态及航向信息的重要仪表,其指示精度直接影响着飞行员的驾驶操纵和自动驾驶仪的性能。针对某型航向姿态参考系统在测试过程中出现的磁航向误差偏大故障,从理论上对该系统进行机理分析,建立故障树,通过实地操作检测,对底事件进行逐一分析,筛查问题原因,对故障进行定位和排除。结果表明:航向姿态参考系统出现的磁航向误差偏大故障的原因是采用GPS信号修正输出值时混淆了变量含义,在磁航向解算算法的设计上不够严谨,导致误差较大,采用故障树分析方法能够成功定位和排查该故障。Attitude and heading reference system(AHRS)is an important instrument used to measure,calculate and provide flight attitude and heading information.Its indication accuracy directly affects the pilot's control and the performance of autopilot.Aiming at the fault that the magnetic heading error of a certain type of heading and atti⁃tude reference system is too large in the test process,in this paper,the mechanism of the system is theoretically an⁃alyzed,the fault tree is established,and the bottom events are analyzed one by one through actual operation detec⁃tion,so as to screen the cause of the problem,and successfully locate and eliminate the fault.The results show that:the reason of the large magnetic heading error of the AHRS is that the meaning of the variables is confused when the GPS signal is used to correct the output value.The design of the magnetic heading algorithm is not rigor⁃ous enough,which leads to large error.The fault tree analysis method can successfully locate and check the fault.

关 键 词：航向姿态参考系统 磁航向 故障树 航迹角 修正 

分 类 号：V241.6[航空宇航科学与技术—飞行器设计]