The Open Mechanical Engineering Journal

2015, 9 : 630-636
Published online 2015 September 16. DOI: 10.2174/1874155X01509010630
Publisher ID: TOMEJ-9-630

The Reliability Evaluation of Electromagnetic Valve of EMUs Based on Two-Parameter Exponential Distribution

Jianwei Yang , Chunqing Zhao , Xi Li and Fumin Wang
School of Machine-electricity and Automobile Engineering, Beijing University of Civil Engineering Architecture, Beijing, 100044, P.R. China.

ABSTRACT

In order to solve reliability evaluation of life of electromagnetic valve of EMUs, this paper evaluated the life of electromagnetic valve under small sample size based on zero-failure data. Firstly, prior distribution of the failure probability was taken into consideration and then the posteriori distribution was obtained by using the Bayes method so that the Bayes estimation could be received under the square loss. Finally, according to the pi received, the reliability parameters of two-parameter exponential distribution were estimated based on weighted least square method. In addition, this paper applied the reliability theory to the reliability life evaluation of electromagnetic valve of EMUs which shows that this method can solve the reliability assessment problem providing certain theoretical basis for the reliability of electromagnetic valve.

Keywords:

EMUs electromagnetic valve, Bayes method, Two-parameter exponential distribution, Weighted least square method..