均匀分布下系统瞬时可用度理论分析

杨懿; 任思超; 于永利

doi:10.13700/j.bh.1001-5965.2015.0058

均匀分布下系统瞬时可用度理论分析

doi: 10.13700/j.bh.1001-5965.2015.0058

1.
北京航空航天大学可靠性与系统工程学院, 北京 100083
2. 南京理工大学理学院, 南京 210094
3. 军械工程学院装备指挥与管理系, 石家庄 050003

基金项目: 国家自然科学基金(61104132, 61573041)

详细信息

作者简介:
杨懿女,博士,副教授。主要研究方向:可靠性分析,可修系统以及控制科学工程。Tel.:010-82316879E-mail:yang_cissy@163.com

通讯作者:
杨懿,Tel.:010-82316879E-mail:yang_cissy@163.com

中图分类号: V249.4
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出版历程
- 收稿日期: 2015-01-29
- 网络出版日期: 2016-01-20

Theory analysis of system instantaneous availability under uniform distribution

YANG Yi^{1
, ,},
REN Sichao²,
YU Yongli³

1.
School of Reliability and Systems Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China
2. School of Sciences, Nanjing University of Science and Technology, Nanjing 210094, China
3. Department of Equipment Command and Management, Ordnance Engineering College, Shijiazhuang 050003, China

Funds: National Natural Science Foundation of China (61104132, 61573041)

摘要

摘要: 对单部件可修系统的瞬时可用度在其初期出现的波动现象进行了理论分析,介绍了现今2种可用度研究进展并分析了对瞬时可用度研究的重要性。分别讨论了系统部件的故障时间及修复时间都服从相同和不同均匀分布的情况,通过把可用度的更新方程转化为分段的时滞或常微分方程,运用初值与连续性给出了系统瞬时可用度的解析表达式。提出了判断瞬时可用度波动的方法,即判断是否存在小于稳态可用度的点,并验证了该方法的有效性。得到了无论均匀分布为何种参数组合,瞬时可用度均存在波动性的结论。最终的仿真结果和理论结果相一致。
- 瞬时可用度 /
- 稳态可用度 /
- 均匀分布 /
- 波动性 /
- 微分方程
Abstract: The early volatility of instantaneous availability which belonged to one-unit repairable system was analyzed in theory. Recent research progress on two kinds of availabilities was reported and the importance of research on the instantaneous availability was highlighted. It was respectively discussed that the failure time and repair time of system components obeyed the same as well as different uniform distribution, and then the renewal equation was transformed into piecewise ordinary differential equations or delay differential equations. The analytical expressions of instantaneous availability were obtained from the differential equations by the use of the continuity and initial value. A method was put forward to judge the volatility of instantaneous availability, that is, to judge whether there existed the value of instantaneous availability less than that of the steady-state availability. The method has been proved to be effective, and the conclusion demonstrates that the volatility exists regardless of any parameter combination under uniform distribution. The final simulation results are in good agreement with the theoretical results.
- instantaneous availability /
- steady-state availability /
- uniform distribution /
- volatility /
- differential equation

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参考文献(21)

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