某型无人机滑跑过程中异常振动分析  

Analysis of abnormal vibration of a UAV during taxiing

作　　者：王绍楠 雷鸣[1] 卢晓东[1] WANG Shaonan;LEI Ming;LU Xiaodong

机构地区：[1]中国飞行试验研究院飞机所

出　　处：《现代机械》2019年第3期83-86,共4页Modern Machinery

摘　　要：某型无人机在起飞、着陆滑跑状态下前机身出现了频率为43 Hz左右的一个幅值较大的异常振动信号,伴随出现的还有其倍频。通过可能的原因排查,前起落架摆振试验及对滑行数据的时频分析,判定外界激励激起前起的固有模态是导致该异常振动的原因。An abnormal vibration signal with a frequency of 43 Hz appeared on the front fuselage of a certain UAV in the state of taking-off,landing and taxiing,accompanied by its frequency doubling.Through investigation of possible causes,shimmy test of nose landing gear and time-frequency analysis of taxiing data,it is determined that the external excitation excited the inherent mode of front landing gear caused the abnormal vibration.

关 键 词：异常振动 前起落架 滑行 时频分析 

分 类 号：V217.3[航空宇航科学与技术—航空宇航推进理论与工程]