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Complex system dynamic fault tress modeling method based on service path

A technology of dynamic fault tree and business path, applied in the direction of transmission system, digital transmission system, electrical components, etc., to achieve the effect of avoiding the difficulty of reliability modeling

Inactive Publication Date: 2016-10-12
BEIHANG UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of reliability modeling of structural coupling, functional dependence, and fault propagation integration and networked complex systems, and propose a dynamic fault tree modeling method based on business paths, which can effectively network Model the complex logical relationship of the system, and at the same time provide a process-oriented method, which is convenient for application in engineering practice

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  • Complex system dynamic fault tress modeling method based on service path
  • Complex system dynamic fault tress modeling method based on service path
  • Complex system dynamic fault tress modeling method based on service path

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Embodiment Construction

[0032] The present invention will be described in further detail below in conjunction with accompanying drawings and examples.

[0033] The invention is an avionics network fault analysis method based on a dynamic fault tree. This fault analysis method considers the characteristics of the current avionics network software and hardware coupling and fault dynamic correlation, and more realistically considers the fault factors in the actual operation of the avionics network.

[0034] The following example is an example of the avionics full-duplex communication Ethernet exchange (AFDX) in the avionics network (Jiang Liyun. Research on key technologies of AFDX network [D]. Xidian University, 2013.) The dynamics of incorrect data reliability in the entire network Fault tree modeling, the specific steps are as follows:

[0035] Step 1: First, abstract the service path for the complex AFDX network.

[0036] Analyze the running process of each service on the network at the system lev...

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Abstract

The invention discloses a complex system dynamic fault tree modeling method based on a service path, and belongs to the technical field of reliability and security. The method comprises the steps of analyzing a complex system, abstracting out the service path, determining a fault treetop event according to a service object, and establishing a function sequential dependency graph; and establishing a fault tree according to a conversion rule of the function sequential dependency graph to the dynamic fault tree. According to the method, the complex logic relation of the networked system can be effectively modeled, and the reliable analysis requirement on different devices in the engineering can be flexibly met; and meanwhile the flow-type reliable modeling method is provided, thus being convenient to be applied to engineering practice.

Description

technical field [0001] The invention provides a complex system reliability modeling method, which belongs to the technical field of reliability and safety (safety system engineering). Specifically, it refers to a dynamic fault tree modeling method for complex systems based on business paths. Background technique [0002] A fault tree represents the logical relationship between events in the form of a graph. The potential weak link of system reliability or security can be found out by using the fault tree model, so as to improve the design and improve the reliability or security of the system, so it is widely used in engineering practice. With the advancement of computer and network technology, the modern industrial engineering system is developing in the direction of integration and networking. Due to the role of information flow, networked systems have complex characteristics such as mutual coupling between network structures, interdependence of functions between network ...

Claims

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Application Information

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IPC IPC(8): H04L12/24
CPCH04L41/0636H04L41/145
Inventor 黄宁白亚南孙利娜伍志韬
Owner BEIHANG UNIV
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