| 一种基于频率变化线的飞机振源分析方法 |
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| 引用本文： | 苏越,王东森.一种基于频率变化线的飞机振源分析方法[J].中国科技信息,2013(23):180-183. |
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| 作者姓名： | 苏越 王东森 |
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| 作者单位： | 中国飞行试验研究院飞机所,陕西西安710089 |
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| 摘 要： | 对于飞行试验中非平稳振动信号,进行时频分析后仅可定性的观察到频率值随时间发生变化的趋势,为了确定振源机理,需要进一步寻求频率变化与飞行参数变化之间的相关性.提出了一种把所关注频率值的变化曲线从时频分析图中提取出来的方法,以定量的研究引起频率值变化的原因.针对某型机平飞状态出现的垂尾尖部振动较大现象,运用此方法提取频率变化线,通过与发动机参数的对比与拟合,确认了该振动产生的振源来自发动机的高压转子.
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| 关 键 词： | 频率变化线 振动 飞行试验 振源 时频分析 |
A method for aircraft vibration source analysis based on frequency variation line |
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| Su Yue Wang Dongsen.A method for aircraft vibration source analysis based on frequency variation line[J].CHINA SCIENCE AND TECHNOLOGY INFORMATION,2013(23):180-183. |
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| Authors: | Su Yue Wang Dongsen |
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| Institution: | Su Yue Wang Dongsen(Department of Aircraft, Chinese Flight Test Establishment, Xi＇ an 710089, China) |
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| Abstract: | The Time-Frequency analysis for non-stationary vibration signals can only give the qualitative trend of the frequency change with time. In order to determine the mechanism of vibration source, the correlation between the frequency value and flight parameters is often in need. In this paper, a method to extraction the curve of the frequency value is put forward so that the reason why the frequency value changes can be analyzed. During a flight test of some type plane, the vibration of the vertical fin is high. This method is applied to this case and by fitting the frequency values with the engine parameters, the source of this vibration is determined to be high pressure rotor of engine. |
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| Keywords: | frequency variation line vibration flight test vibration source Time-Frequency analysis |
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