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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2017, Vol. 38 ›› Issue (8): 220868-220868.doi: 10.7527/S1000-6893.2017.220868

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Reliability analysis for multi-state coherent system with monotonic components based on pivotal boundary points of clustering states

ZHANG Yongjin1, SUN Youchao2, ZHANG Yanjun3   

  1. 1. School of Mathematics and Physics, Anhui University of Technology, Maanshan 243002, China;
    2. College of Civil Aviation, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China;
    3. College of Mechanical Engineering, Yangzhou University, Yangzhou 225127, China
  • Received:2016-10-19 Revised:2017-02-26 Online:2017-08-15 Published:2017-04-19
  • Supported by:

    National Natural Science Foundation of China (U1333119,60979019,60572171,51605424,71601002);CAAC Science and Technology Project (MHRD201123,MHRD200908,MHRD0722);Natural Science Foundation of Jiangsu Province (BK20150455)

Abstract:

Considering the monotone and coherence of the multi-state system, the multiple discrete function theory is introduced to describe the structure function of system state. The logic approaches for the equivalence class of the component state which control the state vector of system are proposed, and the expressions for the state structure function, reliability and expected states are derived for the multi-state coherent system. To avoid the complexity of computation caused by the number of the state, the Demogen law and the new block diagram algorithm are developed to simplify the expression for the system reliability. An illustrative example of a certain type of aero engine verifies the effectiveness of the logic vector measure controlling the state equivalence class and the block diagram algorithm. It provides theoretical basis for reliability design and reliability management of system engineering.

Key words: pivotal boundary point, discrete function, multi-state coherent system, monotonicity, reliability

CLC Number: