两支路自动循环调配系统的可靠性研究  

Reliability Research of Two-Branch Automatic Cycle Switching Systems

作　　者：刘卫东[1,2] 张楠熙 刘洋[3] 汪怀忠 

机构地区：[1]南昌大学机电工程学院,江西南昌330031 [2]南昌航空大学经济管理学院,江西南昌330063 [3]泛亚汽车技术中心有限公司空调电子部,上海201201

出　　处：《机械设计与制造》2017年第10期264-267,271,共5页Machinery Design & Manufacture

基　　金：国家自然科学基金资助项目(71461020);广东省科技厅产学研合作项目(2012B091100175);江西省教育厅资助项目(12001335)

摘　　要：两支路自动循环调配系统广泛应用于空调等电气系统的温、湿度自动调节,即当温、湿度等控制参数达到某一设定阈值时,调配系统自动切换至另一支路进行工作以达到参数调控的目的。针对部件寿命服从指数分布的情况,分析了转换开关失效对系统可靠性的影响模式,构建了两支路自动循环调配系统的物理模型,应用Markov链理论求出冷贮备条件下系统不同状态间的转移概率及其转移率矩阵,再通过Laplace变换得到在不同条件下两支路自动调配冷贮备系统的可靠性预测公式。空调系统的应用研究验证了可靠性预测模型的有效性。Two-branch automatic switching cycle system is widely used in air-conditioner and other electrical systems adjusting the temperature and humidity automatically, that is, when the controlled parameter such as temperature and humidity reach a set value, the system will automatically switch to the other branch for controlling the parameter. In this paper, when the lifetime of the components is exponential distributions, we analyze the effect model about switch failures on system reliability and construct the physical model of two-branch automatic cycle switching systerm Using the Markov chain theory, we put forward the system＇s transfer probability and its matrix between different states and the transfer rate matrix under cold standby condition. Furthermore, the reliability prediction formula of cold nonmaintained redundant of two-branch automatic cycle switching system was obtained by using Laplace transform. Finally, applications of air conditioning systems prove the effectiveness of the model.

关 键 词：可靠性 自动循环调配 冷贮备系统 MARKOV链 空调系统 

分 类 号：TH16[机械工程—机械制造及自动化] TP273[自动化与计算机技术—检测技术与自动化装置]