Acceleration signal noise recognition and removal method based on autocorrelation function and vmd

• Main Authors: YANG GUANG, FAN FEI, QIN CHUN, WU JUN, XU CHENGCHAO, CAI YUMENG, SHEN YINGCHUN, LI SHU, CHU SHUAI, ZHU BINGTAO, YUAN RUI, HUANG JIYUAN, WANG GUOHUA
• Format: Patent
• Language: Chinese; English
• Published: 08.03.2024
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; PHYSICS

The invention discloses an acceleration signal noise identification and removal method based on an autocorrelation function and vmd, and the method comprises the following steps: 1, obtaining a section of standard acceleration noise-containing signal, and taking the section of signal as a reference noise-containing signal; step 2, calculating a normalized self-correlation sequence of the reference noisy signal and solving a three-time standard deviation of the normalized self-correlation sequence to construct a control interval of the self-correlation sequence of the reference noisy signal; step 3, extracting a control interval of the normalized autocorrelation sequence of the reference noisy signal and a percentage e of the normalized autocorrelation sequence of the reference noisy signal exceeding the control interval; step 4, establishing an autocorrelation sequence exceeding proportion feature library of the noisy signals and the non-noisy signals, and determining a critical value e (critical) of a percen