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A Control Method for Fault Propagation in Cyber-Physical Systems

A cyber-physical system and fault propagation technology, which is applied in the field of control of fault propagation in cyber-physical systems, can solve problems such as the impact of fault propagation is not clear, and achieve the goals of reducing component failure probability, intuitive operation analysis, and improving efficiency and accuracy Effect

Inactive Publication Date: 2020-12-15
TIANJIN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, this method only considers the fault propagation at a single system level, and the influence of the interaction between systems on fault propagation is not clear, and it is suitable for relatively simple systems.

Method used

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  • A Control Method for Fault Propagation in Cyber-Physical Systems
  • A Control Method for Fault Propagation in Cyber-Physical Systems
  • A Control Method for Fault Propagation in Cyber-Physical Systems

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Embodiment 1

[0047] An embodiment of the present invention provides a method for controlling fault propagation of a cyber-physical system, see Figure 1 to Figure 3 , the method includes the following steps:

[0048] 101: Build a cyber-physical system operating process model through Petri networks, component states, and state transitions;

[0049] 102: Based on the improved Monte Carlo simulation, fault identification is performed on the operation process model of the cyber-physical system;

[0050] 103: Change the S_element and T_element related parameters of the cyber-physical system, observe the impact of a specific system component or process on the reliability of the cyber-physical system, determine the weak links of components and transfers in the cyber-physical system; realize the control of fault propagation ;

[0051] 104: Guarantee the reliable operation of cyber-physical systems from two aspects of component and fault information transmission.

[0052] That is, it includes: t...

Embodiment 2

[0063] The scheme in embodiment 1 is further introduced below in conjunction with specific calculation formulas and examples, see the following description for details:

[0064] 201: Construct reliable operation characterization functions of cyber-physical systems;

[0065] The embodiment of the present invention extracts structured information on the basis of the Petri net and information physical system characteristics, and then calculates the reliability of the information level according to the reliability of S_elements and T_elements (that is, node reliability and interaction process reliability). sex.

[0066]

[0067] System operation reliability is guided by the normal operation of cyber-physical system service objects, and the analysis process considers the reliability of nodes and interaction processes, as shown in formula (1).

[0068] For a cyber-physical system, the reliability model of the system operation must include many sub-processes. The research of the ...

Embodiment 3

[0120] The following combined with specific examples, Figure 1-Figure 4 , and Table 1-Table 4, carry out feasibility verification to the scheme in embodiment 1 and 2, see the following description for details:

[0121] I. Establish an operation model (mathematical model) between the input and output of the cyber-physical system of the distribution network;

[0122] Such as Figure 4 shown. where S 0 Indicates that the cyber-physical system of the distribution network is in a normal operating state, and the system elements represented by each S_ element and T_ are shown in Table 1 and Table 2.

[0123] Table 1 Meaning of S_element of distribution network cyber-physical system operation model

[0124]

[0125] Table 2 Meaning of distribution network cyber-physical system operation model T_ element

[0126]

[0127] II, determine the probability distribution of each S_yuan and T_yuan;

[0128] At this time, it is necessary to use the existing research results of phys...

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Abstract

The invention relates to a control method for fault propagation of an information physical system. The method comprises the steps of: constructing the running process model of the information physicalsystem through a Petri network, component states and state transition; on the basis of improved Monte Carlo simulation, performing fault identification on the running process model of the informationphysical system; changing related parameters of an S_ component and a T_ component in the information physical system, observing influence of a certain component or process on the reliability of theinformation physical system, and determining weak links of components and transition in the information physical system; realizing control on fault propagation; and ensuring reliable running of the information physical system in two aspects including components and fault information transmission. According to the control method disclosed by the invention, the system running reliability analysis isrealized; simultaneously, influence of various components and processes on fault propagation of the system can be analyzed; fault propagation can be inhibited by corresponding measures; and thus, effective running of the system is ensured.

Description

technical field [0001] The invention relates to the field of cyber-physical systems, in particular to a method for controlling fault propagation of cyber-physical systems. Background technique [0002] Cyber-physical system is a new type of intelligent complex system deeply coupled with multi-dimensional heterogeneous perception, communication and computing units and physical devices. It is a key supporting technology to realize the observability and complex dynamic control of large-scale information networks. The reliability evaluation of cyber-physical systems is relatively complicated, and the interaction and mutual influence mechanism between the physical level and the information level is still difficult to clarify. For the construction of traditional models such as series-parallel models, distribution models, and Markov chains, it is impossible to describe the system operation process, which means that the system Reliability evaluation is powerless, so it is necessary ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/24H04L12/26
CPCH04L41/0677H04L41/12H04L41/145H04L43/0805
Inventor 杨挺黄志勇盆海波侯昱丞刘佳林赵英杰王萌陈彬黄建业
Owner TIANJIN UNIV