Bearing stress wave signal noise reduction method for fault targeted enhancement

• Main Authors: CAO LIANG, XU ZHI, XU CHONG, SHAN TIANMIN, WANG JINGLIN, HUANG YUJING, JIE ZHENGUO, SHEN YONG, XIAO HONGYU
• Format: Patent
• Language: Chinese; English
• Published: 16.07.2024
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; MEASURING; MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER,MECHANICAL EFFICIENCY, OR FLUID PRESSURE; PHYSICS; TESTING; TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES; TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR

The invention discloses a bearing stress wave signal noise reduction method oriented to fault target enhancement, and belongs to the field of fault diagnosis and health management, stress wave sensors are arranged around a tested fault bearing part, and stress wave monitoring signals are collected; constructing a fault intensity factor FIF through a target evaluation index TEI and a kurtosis index Kurt, finding out a center frequency and a filtering bandwidth corresponding to a frequency band interval with the maximum fault intensity factor, and carrying out band-pass filtering on the collected stress wave signal; performing morphological filtering on the stress wave signal after band-pass filtering; and carrying out envelope spectrum analysis on the stress wave signal after morphological filtering, and comparing a fault frequency spectral line to carry out diagnosis. Aiming at the problem that non-target component interference such as noise, random pulse and non-target periodic pulse inevitably exists in a b