设备集成系统可靠性计算方法研究及应用
发布时间：2018-10-24 10:39
【摘要】：随着现代科学技术的不断发展,将各个分离的设备单元按照特定连接方式进行集成,形成具有高度耦合、高度关联的设备集成系统。设备集成系统已广泛成为现代生产系统的主流模式,它的可靠性对系统生产,行业的正常、高效运营起着重要的作用。但是对于设备集成系统的可靠性分析还仅限于利用传统的单一方法,不能满足其结构复杂、设备连接方式多样等特点的可靠性分析的需求。如何基于设备单元的可靠性对系统的可靠性进行分析预测,对复杂设备集成系统的状态研究则显得尤为重要。 本文针对设备集成系统的结构组成特点及成熟网络理论,分别以设备单元和子系统为节点,故障率为节点属性；节点之间作用关系为边,作用强度为边权,构建了一种可以反映系统原貌的可靠性网络模型——基于网络理论的可靠性计算方法。该方法具有结构化、模块化、网络化建模特点,可以根据设备单元的可靠性自下而上的有效分析系统可靠性。提出了节点可靠度的计算方法,该方法不同于以往的仅依赖节点故障率而是综合考虑了节点之间的相互关联和节点本身的可靠性。根据节点的可靠度利用GENERATER算法得出了系统的最大概率状态空间；在系统模态空间下,基于模型中节点间的作用强度,对马尔科夫过程转移矩阵进行改进,并采用可用度、失效频率和失效平均间隔时间参数评估设备集成系统的可靠性。通过可靠性相关指标及系统结构中节点的结构重要度,得到系统的关键节点。基于构建的可靠性计算方法对高速列车部分系统进行了可靠性建模与可靠性计算应用与验证。研究表明,该可靠性计算方法为现代设备集成系统的可靠性研究提供了新的参考方法。
[Abstract]:With the continuous development of modern science and technology, each separated device unit is integrated according to the specific connection mode to form a highly coupled and highly related device integration system. Equipment integration system has become the mainstream mode of modern production system, and its reliability plays an important role in the system production, the normal and efficient operation of the industry. However, the reliability analysis of the equipment integration system is limited to the traditional single method, which can not meet the needs of reliability analysis, such as complex structure and various equipment connection modes. How to analyze and predict the reliability of the system based on the reliability of the equipment unit is particularly important for the study of the state of the complex equipment integrated system. According to the structural characteristics and mature network theory of the equipment integration system, this paper takes the equipment unit and subsystem as the node, the failure rate as the node attribute, the action relationship between the nodes as the edge, the action intensity as the edge weight, and the fault rate as the node attribute. A reliability network model based on network theory, which can reflect the original appearance of the system, is constructed. This method has the characteristics of structured, modular and networked modeling, and can effectively analyze the reliability of the system from bottom to top according to the reliability of the equipment unit. A new method for calculating the reliability of nodes is proposed. This method is different from the previous method, which only depends on the failure rate of nodes, but takes into account the correlation between nodes and the reliability of nodes themselves. According to the reliability of nodes, the maximum probabilistic state space of the system is obtained by using GENERATER algorithm, and the Markov process transfer matrix is improved based on the interaction intensity between nodes in the modal space of the system, and the availability is adopted. Failure frequency and mean interval time parameters are used to evaluate the reliability of the equipment integrated system. The key nodes of the system are obtained by the reliability related indexes and the structural importance of the nodes in the system structure. Based on the reliability calculation method, the reliability modeling and reliability calculation of some high-speed train systems are carried out. The research shows that the reliability calculation method provides a new reference method for the reliability research of modern equipment integration system.
【学位授予单位】：北京交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U270;TB114.3
本文编号：2291153
[Abstract]:With the continuous development of modern science and technology, each separated device unit is integrated according to the specific connection mode to form a highly coupled and highly related device integration system. Equipment integration system has become the mainstream mode of modern production system, and its reliability plays an important role in the system production, the normal and efficient operation of the industry. However, the reliability analysis of the equipment integration system is limited to the traditional single method, which can not meet the needs of reliability analysis, such as complex structure and various equipment connection modes. How to analyze and predict the reliability of the system based on the reliability of the equipment unit is particularly important for the study of the state of the complex equipment integrated system. According to the structural characteristics and mature network theory of the equipment integration system, this paper takes the equipment unit and subsystem as the node, the failure rate as the node attribute, the action relationship between the nodes as the edge, the action intensity as the edge weight, and the fault rate as the node attribute. A reliability network model based on network theory, which can reflect the original appearance of the system, is constructed. This method has the characteristics of structured, modular and networked modeling, and can effectively analyze the reliability of the system from bottom to top according to the reliability of the equipment unit. A new method for calculating the reliability of nodes is proposed. This method is different from the previous method, which only depends on the failure rate of nodes, but takes into account the correlation between nodes and the reliability of nodes themselves. According to the reliability of nodes, the maximum probabilistic state space of the system is obtained by using GENERATER algorithm, and the Markov process transfer matrix is improved based on the interaction intensity between nodes in the modal space of the system, and the availability is adopted. Failure frequency and mean interval time parameters are used to evaluate the reliability of the equipment integrated system. The key nodes of the system are obtained by the reliability related indexes and the structural importance of the nodes in the system structure. Based on the reliability calculation method, the reliability modeling and reliability calculation of some high-speed train systems are carried out. The research shows that the reliability calculation method provides a new reference method for the reliability research of modern equipment integration system.
【学位授予单位】：北京交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U270;TB114.3
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