As an action trigger mechanism,the mechanical performance of the opening accessory is very important for the reliable operation of conventional circuit breaker.Aiming at its life prediction,a life prediction method based on binary Wiener performance degradation analysis is proposed.Combining the working mechanism of the opening accessory,the method adopts the vibro-electrical joint analysis mode.First,CEEMDAN-WD and double-threshold method based on short-term energy entropy ratio are used to realize the accurate calibration of the vibration events for the specific actions in the triggering stage of the opening process.Then,the time and driving energy parameters of the mechanism action cor-responding to the vibration event are used as the performance degradation index.On this basis,a binary Wiener model is constructed with the vibro-electrical joint analysis index as the input of the prediction model,and the quantitative predic-tion of the remaining life is realized finally.The tests on three circuit breakers show that the life prediction method based on vibro-electrical synergistic analysis has higher prediction accuracy.The average relative errors of the three test prod-ucts are 4.3%,9.77%,and 8.46%,respectively,which has engineering practicality.
关键词
万能式断路器/振电信号/性能退化/二元维纳过程/剩余寿命预测
Key words
conventional circuit breaker/vibro-electrical signals/performance degradation/binary Wiener process/re-maining useful life prediction
维普
万方数据