测试技术学报2019，Vol.33Issue(1)：19-23,5.DOI:10.3969/j.issn.1671-7449.2019.01.004
基于修正傅立叶级数展开的非稳态振动信号分析
Non-Stationary Vibration Analysis Based on Modified Fourier Series Expansion
张武林 1高文涛1
作者信息
- 1. 中国飞行试验研究院 飞机所,陕西 西安 710089
- 折叠
摘要
Abstract
The vibration signal of the helicopter is non-stationary during maneuvering flight, and the traditional Fourier transform cannot get the change trend.The transient signal of flight test is analyzed based on modified Fourier series expansion method in this paper.The results show that by this method using the changes of non-stationary vibration signal are captured accurately.In addition, since this method has a small amount of calculation, it has a good real-time performance and can be applied in realtime vibration monitoring to reduce the risk and ensure the safety of flight test.关键词
振动分析/傅立叶级数展开/非平稳特性/振动监控Key words
vibration analysis/Fourier series expansion/non-stationary characteristics/vibration monitoring分类
航空航天引用本文复制引用
张武林,高文涛..基于修正傅立叶级数展开的非稳态振动信号分析[J].测试技术学报,2019,33(1):19-23,5.
