Method for carrying out NSST time-frequency analysis of bearing fault signal

• Main Authors: HAO GUOCHENG, GAN YU, ZHANG WEI, LING SIQI, WANG PANPAN, JIN YARUI
• Format: Patent
• Language: Chinese; English
• Published: 16.04.2021
• Subjects: MEASURING; PHYSICS; TESTING; TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES; TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR

The invention provides a method for carrying out NSST time-frequency analysis on a bearing fault signal, and the method comprises the following steps: carrying out the nonlinear sparse decomposition of a non-stationary signal, and obtaining each decomposed signal sparse component; performing synchronous compression transformation SST on each decomposed signal sparse component in sequence to obtain a compressed sparse component; and rearranging the compressed sparse components according to time frequency, and accumulating and integrating rearranged results to obtain finally processed non-stationary signal time frequency distribution. The method has the advantages that the aggregation degree of bearing fault signal time-frequency distribution can be well improved, the frequency curve generated by the fault can be obtained more accurately, and the method is well applied to diagnosis of the bearing fault. 本发明提出了一种用于对轴承故障信号进行NSST时频分析的方法，包括以下步骤：对非平稳信号进行非线性稀疏分解，得到分解后的各个信号稀疏分量；对分解后的各个信号稀疏分量依次进行同步压缩变换SST，得到压缩后的稀疏分量；将压