Optimal Maintenance Policy of Repairable System with Bathtub Shaped Intensity

摘要：

The power law process (PLP) and log linear process (LLP) are able to describe the processes with monotonic trend during the operating time. However, these models are not able to describe the processes with a non-monotonic trend such as bathtub shaped intensity. In this paper we proposed the superposed log linear process (S-LLP) for modeling bathtub shaped intensity function. The S-LLP is a nonhomogeneous Poisson process (NHPP) that results from the superposition of two LLP with different parameters. To get the maximum likelihood (ML) estimates, we proposed the three-parameter loglikelihood function evaluated using a genetic algorithm. Also, to obtain approximated confidence intervals, the information matrix and the variance-covariance matrix have been evaluated. The suggested methods are applied to field data from a repairable system.

关键词： bathtub-shaped intensity minimal repair nonmonotonictrend nonhomogeneous poisson process auperposed log-linear process

作者: Byeong Min MUN Suk Joo BAE

作者单位: Department of Industrial Engineering Hanyang University Seoul, Korea

会议类型: 国际会议

会议名称: 2011 International Conference on Quality,Reliability,Risk,Maintenance,and Safety Engineering(2011年质量、可靠性、风险、维修性与安全性国际会议暨第二届维修工程国际学术会议 ICQR2MSE 2011)

会议地点: 西安

会议语种:英文

页码: 444-448

在线出版日期: 2011-06-17（万方平台首次上网日期，不代表论文的发表时间）