Journal of Northeastern University Natural Science ›› 2014, Vol. 35 ›› Issue (4): 559-563.DOI: 10.12068/j.issn.1005-3026.2014.04.024

• Mechanical Engineering • Previous Articles     Next Articles

Reliability Model for Warm Standby Series System Considering Replacement Time of Fault Unit

YIN Mingang1, SUN Zhili1, XU Lu2, DU Yongying3   

  1. 1. School of Mechanical Engineering & Automation, Northeastern University, Shenyang 110819, China; 2. Commercial Software Division, Neusoft Group, Shenyang 110004, China; 3. School of Mechanical Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China.
  • Received:2013-04-14 Revised:2013-04-14 Online:2014-04-15 Published:2013-11-22
  • Contact: YIN Mingang
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Abstract: Taking the series system of two units as example, each unit was matched with a same spare unit, and two repairmen were arranged to perform maintenance of the system. In considering that the repairman can coordinate work and replacement time of fault unit, a system model was established on the basis of normal work of the system. A formula of system availability, system reliability, rate of occurrence of failure and mean time to first failure was derived by operating the state transition probability matrix. The results showed that the system steadystate availability increases with working life of the subsystem. Especially when the working lives of the two subsystems are at the same level, the gain of system steadystate availability is the most obvious. This study provides theoretical basis for the further study of complex mechanical system reliability.

Key words: system reliability, availability, warm standby, series system, Markov process

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