Journal of Shanghai Jiaotong University ›› 2013, Vol. 47 ›› Issue (11): 1661-1665.

• Metallography and Metallurgical Technology • Previous Articles     Next Articles

Aperiodic Imperfect Preventive Maintenance Method of Bounded Intensity Process for Numerical Control Machine Tools

WANG Zhiming1,YANG Jianguo2
  

  1. (1. School of Mechanical Engineering, Huaihai Institute of Technology, Lianyungang 222005, Jiangsu, China; 2. School of Mechanical Engineering, Shanghai Jiaotong University, Shanghai 200240, China)
  • Received:2012-12-06 Online:2013-11-28 Published:2013-11-28

Abstract:

Based on bounded intensity process, an aperiodic imperfect preventive maintenance policy for numerical control machine tools with random maintenance quality under reliability limit was proposed. A hybrid model, which considers the effect of maintenance to virtual age and the fact that failure intensity increases as operational time increases, was presented. The treating average cost as an objective function, maintenance intervals and the number of optimum maintenance were given iteratively when increasing value of failure intensity and maintenance quality were both random variables with uniform distribution. Finally, a discussion for a real numerical example was presented to show the dependence of optimal results on different cost parameters.
 

Key words: preventive maintenance, reliability, bounded intensity process, random maintenance quality;  , virtual age

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