Penetration Acceleration Signals Drill Layer Characteristics Extracting Method Based on Effective Short-time Energy Spectrum
In order to solve the problem that acceleration signals are seriously aliased under high-speed penetra-tion conditions,this paper proposed a new method of extracting drill layer characteristics of penetration accelera-tion signals based on effective short-time energy spectrum.By calculating the effective value of instantaneous ac-celerations,the method eliminated the interference oscillation signal superimposed in the measured acceleration signal.Then the effective acceleration signal was divided into frames by windows to reduce spectrum leakage and ringing effect.And the energy of each frame acceleration signal was calculated to obtain the effective short-time energy spectrum containing the penetrating information.Finally,the maximum envelope of the effective short-time energy spectrum was extracted to obtain the warhead penetration characteristics.The simulation results showed that the algorithm could accurately extract the penetration characteristics and layer identification of the warhead under the complex conditions of high-speed penetration.
penetration fuzeacceleration effectivity valuewindowing and framingshort-time energy
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