| 机载捷联航姿系统精度超差故障分析 |
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| 引用本文： | 杨爱民,程春华,高丽,李林. 机载捷联航姿系统精度超差故障分析[J]. 飞机设计, 2022, 42(4): 66-70，74 |
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| 作者姓名： | 杨爱民 程春华 高丽 李林 |
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| 作者单位： | (1.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,山东青岛266041) |
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| 摘 要： | 捷联航向姿态参考系统是一种重要的机载导航设备,可实现飞机航向、姿态、角速率,以及加速度多维信息的测量。针对某型捷联航姿系统在改装试飞过程中出现的精度超差故障,结合工作原理和捷联航姿系统软硬件设计方案,进行故障机理分析,建立故障树。利用故障树,对底事件进行逐一排查,筛查问题原因,成功定位并顺利排除该故障。通过故障树的定性分析表明,精度超差的原因是系统软件设计中将轮载信号作为地速反馈的先决条件所致。
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| 关 键 词： | 航姿系统 故障树 轮载信号 姿态误差 底事件排查 |
| 收稿时间： | 2021-06-19 |
| 修稿时间： | 2022-05-23 |
Accuracy Failure Analysis on AirborneStrapdown AHRS |
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| YANG Aimin,CHENG Chunhu,GAO Li,LI Lin. Accuracy Failure Analysis on AirborneStrapdown AHRS[J]. Aircraft Design, 2022, 42(4): 66-70，74 |
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| Authors: | YANG Aimin CHENG Chunhu GAO Li LI Lin |
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| Affiliation: | (1.Major Special Equipment Project Management Center, Navy Equipment Department,Beijing 100071,China);(2.Qingdao Branch,Naval Aviation University,Qingdao266041,China) |
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| Abstract: | Strapdown attitude heading reference system (AHRS) is an important airborne navigationequipment , which can measure the multi-dimensional information of aircraft heading, attitude , angularrate and acceleration. Aiming at the accuracy failure of the AHRS in the process of refitting and flight test , combined with the working principle and the software and hardware design scheme of the AHRS,the fault mechanism is analyzed and the fault tree is established. Then, the fault tree is used to check the bottom events one by one,screen the cause of the problem,and the fault is successfully located and eliminated. The fault tree analysis shows that the reason for the accuracy failure is that the wheel load signal is taken as the prerequisite of ground speed feedback in the system software design. |
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| Keywords: | AHRS fault tree wheel load signal attitude error bottom event investigation |
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