Safety analysis method for gearbox gears of heavy haul vehicles

Abstract

The invention provides a safety analysis method for gearbox gears of heavy haul vehicles. The method is characterized in that the method includes in real time monitoring and collecting a vibration signal of a gearbox gear of a to-be-detected heavy haul vehicle, and selecting the optimal index subset with the maximum correlation and the minimum redundancy through distance based sensitive factors and maximum information coefficient (MIC); and establishing a belief rule-base (BRB) and ER inference based model according to selected representative indexes, and performing dimensionality reduction and de-correlation on the characteristic vectors consisting of running state parameters of a heavy haul vehicle gearbox so that the high accuracy analysis of the safety states of the heavy haul vehiclegearbox can be obtained. The advantages of the method are as follows: (1) dimensionality reduction and de-correlation can be performed on the characteristic vectors consisting of the running state parameters of the heavy haul vehicle gearbox; (2) the precision of the model can be enhanced; (3) the method can accurately judge the period of the maintaining, maintenance and part replacing of transmission gears through the assessment of gear states, and has important economic benefits; and (4) the emergent probability and downtime of accidents can be reduced, and the method has important theoretical and practical values for enhancing vehicle driving safety.

Description

technical field [0001] The invention belongs to the technical field of safety evaluation of heavy-duty vehicle systems, in particular to a safety analysis method for heavy-duty vehicle systems considering index correlation and redundancy. Background technique [0002] The gearbox is the main assembly of the heavy-duty vehicle drive train, and it is responsible for the important mission of transmitting power from the engine to the driving system. According to statistics, up to 60% of gearbox failures are gear failures. The heavy-duty vehicle transmission gear is limited by its functional requirements, which determines that the transmission gear must meet high-speed operation and high-torque transmission. Compared with ordinary gears, it has a thinner tooth width, greater transmission power density, and less wear and tear under the premise of limited life. More serious, its reliable operation is particularly important. [0003] At present, the judgment of the operating statu...

AI Technical Summary

Problems solved by technology

Irrelevant and redundant indicators will increase the amount of calculation and reduce the accuracy of evaluation

In addition, each method cannot integrate qualitative and quantitative information, and the interpretability and traceability of the results are not strong

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