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基于集总平均经验模态分解法(EEMD)的星箭解锁分离机构冲击响应分析
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摘要
基于集总平均经验模态分解(Ensemble Empirical Mode Decomposition,EEMD),提出一种星箭解锁分离机构冲击响应信号分析新方法。通过EEMD,将星箭解锁分离机构解锁过程的冲击信号分解成不同模态分量(Intrinsic Mode Function,IMF)。结果表明前两阶模态分量IMF主要为冲击引起的高频振动,而IMF3之后为冲击激励引起的不同阶固有模态振动和局部振动,并通过模态实验验证了分析的正确性。
A new method about the dynamics response analysis of unlocking device of satellite and rocket under impact has been proposed,which is based on Ensemble Empirical Mode Decomposition(EEMD). Dynamics response signal of unlocking device of satellite and rocket under impact can be resolved into different Intrinsic Mode Functions(IMF)by EEMD. Analysis shows that the first two IMFs are high-frequency vibration,which is caused by impacting; While,the IMF3 and the lower IMFs are different model of vibration and local vibration. And it has been verified correctly by the model analysis experimental.
引文
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