High-speed train wheel set bearing weak fault diagnosis method and system
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A fault diagnosis, train wheel technology, used in the testing of measuring devices, instruments, mechanical parts, etc.
Active Publication Date: 2021-09-07
SUZHOU UNIV
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[0005] The object of the present invention is to provide a high-speed train wheel-set bearing weak fault diagnosis method and system, to solve the existing adaptive signal decomposition method in the wheel-set bearing signal decomposition Bringing problems to realize weak fault diagnosis of high-speed train wheel-set bearings
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Embodiment 1
[0067] refer to figure 1 , the embodiment of the present invention provides a high-speed train wheel set bearing weak fault diagnosis method, comprising the following steps:
[0068] S1: Using the feature frequency update trend of the high-speed train wheel set bearing signal to construct a spectrum feature information scanner to obtain the boundary parameters of the potential feature components in the signal;
[0069] S2: Construct a filter bank according to the obtained boundary parameters, decompose the high-speed train wheel set bearing signal, and obtain the corresponding mode components;
[0070] S3: Establish the fusion fault sensitivity index, and locate the fault characteristic component by calculating the fault sensitivity index corresponding to the mode component;
[0071] S4: Perform envelope analysis on the fault feature components to obtain the envelope spectrum, detect weak fault features according to the envelope spectrum, and complete the weak fault diagnosis...
Embodiment 2
[0114] Based on the same inventive concept, this embodiment provides a high-speed train wheel-set bearing weak fault diagnosis system. The problem-solving principle is similar to that of the rail vehicle serial number identification method, and repeated descriptions will not be repeated.
[0115] A high-speed train wheel set bearing weak fault diagnosis system, including:
[0116] The boundary parameter acquisition module is used to construct a spectrum characteristic information scanner by using the characteristic frequency update trend of the high-speed train wheel-set bearing signal, and obtain the boundary parameters of potential characteristic components in the signal;
[0117] The decomposition module is used to construct a filter bank according to the obtained boundary parameters, and decompose the high-speed train wheel set bearing signal to obtain corresponding mode components;
[0118] The fault location module is used to establish the fusion fault sensitivity index,...
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Abstract
The invention discloses a high-speed train wheel set bearing weak fault diagnosis method and system. The method comprises the steps of S1 constructing a frequency spectrum feature information scanner through employing the feature frequency updating trend of a high-speed train wheel set bearing signal, and obtaining the boundary parameters of potential feature components in the signal; S2 constructing a filter bank according to the obtained boundary parameters, and decomposing the high-speed train wheel set bearing signal to obtain a corresponding mode component; S3 establishing a fusion fault sensitive index, and positioning a fault feature component by calculating the fault sensitive index corresponding to the mode component; and S4 performing envelope analysis on the fault feature component to obtain an envelope spectrum, detecting a weak fault feature according to the envelope spectrum, and completing weak fault diagnosis of the high-speed train wheel set bearing. According to the method, the problems caused by an existing self-adaptive signal decomposition method in wheel set bearing signal decomposition are solved, and weak fault diagnosis of the high-speed train wheel set bearing is achieved.
Description
technical field [0001] The invention relates to the technical field of mechanical fault diagnosis, in particular to a method and system for diagnosing weak faults of high-speed train wheel set bearings. Background technique [0002] The wheel set bearing is one of the core components of the high-speed train power system. It supports the axle and bears the load between the wheel set and the car body. Its service performance has an important impact on the safety of high-speed train operation. Because high-speed trains need to experience complex operating conditions such as curves and high speeds, wheel set bearings, as their key load-bearing components, are subject to alternating contact stress, serpentine yaw vibration and impact loads during long-term service, and are prone to fatigue damage and stress. Damage and other performance degradation conditions. If the early weak fault information of the wheel set bearings cannot be detected in time and correctly, it may lead to m...
Claims
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