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| Bounded Intensity Process and Its Applications in Reliability Assessment of NC Machine Tools |
| WANG Zhi-Ming-1, YANG Jian-Guo-2 |
| (1. School of Mechanical Engineering, Huaihai Institute of Technology, Lianyungang 222005, Jiangsu, China; 2. School of Mechanical Engineering, Shanghai Jiaotong University, Shanghai 200240, China) |
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Abstract Based on Akaike information criterion, Bayesian information criterion and the root-mean-square error of the fitting failure data, the best non-homogeneous Poisson process model of reliability analysis for repairable system was proposed. The point maximum likelihood and interval estimators of the parameters, as well as the reliability indices of the bounded intensity process model were given using the asymptotic lognormal distribution of the maximum likelihood estimation and the Fisher information matrix method. The failure data with time truncation of multiple NC machine tools were analyzed. The results show that the bounded intensity process is suitable for reliability assessment of deterioration machine tools with frequent maintenance actions.
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Received: 24 February 2012
Published: 30 October 2012
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