航天器环境工程2016，Vol.33Issue(1)：42-45,4.DOI:10.3969/j.issn.1673-1379.2016.01.007
基于STFT的最大预示环境波形重构新方法
A new waveform reconstruction method based on STFT in the maximum expectant environment
摘要
Abstract
The maximum expectant environment(MEE) of a vibration process means that in an area of a structure, the conservative limit of the vibration environmental data is obtained in the form of a spectrum by measurement or prediction methods. However, for many test methods, especially when the vibration table is used to simulate the low frequency transient environment (with frequency less than 100Hz), the test reference signal waveforms have to be given. Based on the MEE of the vibration process besides the time and frequency analysis, a new method is proposed to reconstruct rapidly the maximum expectant environmental waveform(MEW) in the vibration simulation test. The numerical simulation results show that the error of the calculations by the new method is reduced, and the control is more flexible and efficient as compared with the traditional method, thus the new waveform reconstruction method can be used in the vibration environment test.关键词
最大预示环境/波形重构/振动模拟试验/短时傅里叶变换Key words
maximum expectant environment/waveform reconstruction/vibration simulation test/STFT分类
航空航天引用本文复制引用
邱伟,师培峰,任燕,樊孝春..基于STFT的最大预示环境波形重构新方法[J].航天器环境工程,2016,33(1):42-45,4.
