A Method for Correcting the Shock Response Spectrum in Missile-Borne Products
Year: 2024
Type: conference-paper
Abstract: Missile-borne products often encounter shock signals that include low-frequency interference. Following the detonation of initiating devices, the displacement and velocity values are non-zero, and the acceleration signal exhibits baseline drift. This phenomenon distorts the results of Shock Response Spectrum (SRS) analysis. To address these issues, we propose an enhanced method of SRS analysis based on Variational Mode Decomposition (VMD). This method uses VMD to preprocess the shock signal by decomposing it into multiple modal components. It then eliminates modes dominated by low-frequency interference based on the correlation coefficients of the positive and negative response spectra to correct the signal. The corrected signal is analyzed using SRS, and a standard spectrum type for testing is defined. Simulations demonstrate the effectiveness and accuracy of this method, showing that it can precisely eliminate low-frequency components that interfere with the signal. The revised impulse response spectrum significantly enhances both the time-domain and frequency-domain representations of the signal. By analyzing the signal measured from a missile-borne product during the launch of specific ammunition, the method is validated, effectively resolving the SRS distortion issues caused by baseline drift. This method proves to be highly valuable for analyzing the shock environments of missile-borne product and in developing test spectrums.
Authors: Peng Gao, Haicheng Li, Ziqi Jia, Xiaotao Che, Wu Chao, Minglei Du, Tianyu Sun, Hongjun Yang, Gang Chen
Institution: Northwestern Polytechnical University
Language: English
Subfield: Control and Systems Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W4405848596