Abstract
Based on the dynamic properties of electrical connector intermittent failure, the model and methods for residual life prediction for electrical connectors are studied in this paper. Firstly, the mechanism of electrical connector intermittent failure is analyzed, and the area enclosed by the contact resistance curve and the fault threshold is defined as the generalized severity of intermittent failure to describe how severe the electrical connector’s intermittent failure is. Then, the Hidden Semi-Markov Model (HSMM) is introduced to build the residual life prediction model of the electrical connector. Further, the evaluation method of using the state and prediction method for residual life are studied. Finally, by carrying out the residual life prediction test, the effectiveness of the residual life prediction method for electrical connectors based on intermittent failure and HSMM is verified.
Highlights
Electrical connectors are widely used in equipment systems and are of great importance.The contact condition of connectors significantly affect the reliability and the success rate of the equipment [1,2]
Residual life prediction is an important part of Prognostics and Health Management (PHM)
According the dynamics ofof intermittent failures under different using states, it itisis found that the the area enclosed by the contact resistance curve and the fault threshold increases with thethe the enclosed area enclosed by the resistance contact resistance and the fault threshold with area by the contact curve and curve the fault threshold increases with increases the degradation of degradation of the electrical connector
Summary
Electrical connectors are widely used in equipment systems and are of great importance. The contact condition of connectors significantly affect the reliability and the success rate of the equipment [1,2]. With the increasing service time and the influence of environmental stress, the using states of electrical connectors will be continuously deteriorated, and eventually the connectors failed. To avoid a catastrophic accident, it is necessary to assess the using state of the electrical connectors in good time, and predict the residual life of electrical connectors. Residual life prediction is an important part of Prognostics and Health Management (PHM). Experts and scholars have carried out a lot of research on residual life prediction for various connectors, including relays, circuit breakers, contactors, electrical connectors, and so on
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