Wavelet Transform Post-Recoil Process Energy Density Analysis
The recoil of a cannon after firing is a transient,non-stationary,and non-periodic high-fre-quency signal.The recoil shock at the time of firing directly affects the shooting accuracy and platform adaptability.In view of the problems that the traditional analysis cannot reflect the frequency domain and energy characteristics of the recoil process due to the insufficient extraction of the recoil peak sig-nal,the recoil signal of the test is decomposed by wavelet packet decomposition,and the signals at each layer are reconstructed according to the frequency band to obtain the energy distribution of the sig-nal with time in different frequency bands.Test analysis shows that the recoil energy of the test object is mainly concentrated in the low-frequency band.80.48%of the recoil energy is concentrated in 0～19.53 Hz.The peak duration of recoil force is 3.27%of the recoil process,and the impulse generated during peak time accounts for only 1.64%of the total impulse.The results show that using a time-energy density analysis method based on wavelet transform to analyze the time-domain and frequency-domain characteristics of recoil force signals can provide a new way for evaluating recoil processes and provide reference for recoil buffering and suppression.
recoilimpact force testwavelet transformtime-energy density analysis method
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