Impact load identification of connection-separation device between satellite and rocket with frequency domain method based on EEMD

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Journal of Vibration and Shock ›› 2018, Vol. 37 ›› Issue (17) : 79-85.

ZHANG Yuliang1,YANG Fei1,YUE Honghao1,DENG Zongquan1,XU Yang2

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Abstract

Based on the dynamic load identification principle in the frequency domain method,impact loads of a connection-separation device between satellite and rocket driven using shape memory alloy (SMA) were identified for three times. The EEMD algorithm was used to de-noise and identify impact response signals of measured points,and then three times of impact loads generated in separation process were identified. The test results showed that the frequency domain method based on EEMD can be used to more accurately identify three times of impact loads of the connection-separation device between satellite and rocket with a better recognition effect,the feasibility and correctness of the proposed method is also verified with test results.

Key words

connection-separation device / impact load / parametric identification / frequency domain method / ensemble empirical mode decomposition (EEMD)

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ZHANG Yuliang1,YANG Fei1,YUE Honghao1,DENG Zongquan1,XU Yang2. Impact load identification of connection-separation device between satellite and rocket with frequency domain method based on EEMD[J]. Journal of Vibration and Shock, 2018, 37(17): 79-85

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