Failure symptom early recognition method of bearing of final drive of automobile

Abstract

The invention discloses a failure symptom early recognition method of a bearing of a final drive of an automobile. The method includes following steps: step 1, performing lifetime pre-estimation on the bearing of a main gear of the final drive of the automobile, and developing a test research on the failure of the bearing of the main gear; step 2, processing information uncertainty by employing an information integration estimation method combined by a fuzzy theory and a Dempster-Shafer evidence theory; and step 3, performing analysis fusion on multiple sensors at the same test area. According to the failure symptom early recognition method of the bearing of the final drive of the automobile, the fact that the operation state of the bearing belongs to single symptoms can be obtained from redundant information, recognition and determination which are more accurate and complete than single information sources can be generated, the lack of the priori probability is avoided, and the goal of failure symptom recognition is achieved.

Description

technical field [0001] The invention relates to a speed reducer failure identification method, in particular to a method for early identification of bearing failure symptoms of an automobile main speed reducer, and belongs to the technical field of speed reduction products. Background technique [0002] Bearing is one of the most commonly used general parts in automobiles. Whether its operation is normal or not is related to the working condition of the whole vehicle, especially the main tooth bearing in the main reducer of the automobile. Consistent, during the operation of the car, it is also subjected to alternating vibration and shock, which is prone to failure. After the bearing failure occurs, the operating state will gradually deteriorate until it is paralyzed. This requires early identification, judgment and evaluation of bearing failure. The failure forms of bearings are diverse, and a cause of failure will also show multiple failure symptoms. There is ambiguity bet...

AI Technical Summary

Problems solved by technology

[0002] Bearing is one of the most commonly used general parts in automobiles. Whether its operation is normal or not is related to the working condition of the whole vehicle, especially the main tooth bearing in the main reducer of the automobile. Consistent, during the operation of the car, it is also subjected to alternating vibration and shock, which is prone to failure. After the bearing failure occurs, the operating state will gradually deteriorate until it is paralyzed. This requires early identification, judgment and evaluation of bearing failure. The failure forms of bearings are diverse, and a cause of failure will also show multiple failure symptoms. There is ambiguity between the appearance and the cause; therefore, using the fuzzy pattern recognition method to describe the operating state of the bearing, for a single sensor, It is difficult to distinguish multiple faults in the same symptom domain in bearing fault diagnosis