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An Efficient Simulation Method of System Availability Based on Reachability Matrix and Discrete Event Drive

A technology of discrete events and simulation methods, applied in design optimization/simulation, special data processing applications, etc., can solve the problems of system availability simulation efficiency decline, etc.

Active Publication Date: 2022-05-13
BEIHANG UNIV
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  • Abstract
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Problems solved by technology

However, when the system scale is large or the fault logic relationship of each unit is complex, the efficiency of system availability simulation will drop rapidly

Method used

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  • An Efficient Simulation Method of System Availability Based on Reachability Matrix and Discrete Event Drive
  • An Efficient Simulation Method of System Availability Based on Reachability Matrix and Discrete Event Drive
  • An Efficient Simulation Method of System Availability Based on Reachability Matrix and Discrete Event Drive

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Embodiment Construction

[0036] In order to make the technical solutions, features and advantages of the present invention more clearly understood, the following in conjunction with the accompanying drawings, for detailed description.

[0037] The present invention proposes an efficient simulation method based on the accessibility matrix and discrete event-driven system usability, which can be used for simulation analysis of the usability of complex systems, converts the usable state of the system into the reachable state of the system after the failure of each unit and maintenance, and then obtains its usability simulation value through discrete event drive and multiple simulations. This provides an efficient way to assess the availability of the system. The overall architecture of the present invention, see Figure 1 as shown. Its specific implementation steps are:

[0038] Step 1: The Reliability Block Diagram (RBD) model is converted to an adjacency matrix

[0039] The start and end points of RBD are ...

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Abstract

The invention discloses a high-efficiency simulation method for system availability based on reachable matrix and discrete event drive, which converts the available state of the system into the reachable state of the system after each unit failure and maintenance, and then drives through discrete events and multiple simulations Obtain its availability simulation value, thereby improving the efficiency and effect of complex system availability simulation. The steps are as follows: 1. Transform the reliability block diagram of the system into an adjacency matrix for the normal operation of the system. 2 Define the number of times the simulation converges. 3 Sampling the failure and maintenance time of each unit in the system, sorting them according to time and generating a set of discrete events. 4. Change the elements related to the unit in the adjacency matrix according to the failure event and maintenance event of the unit. 5 Solve the reachability matrix at the occurrence time of each discrete event, and determine the available state of the system according to the reachability relationship between the start unit and the end unit. 6 Calculate the availability of the system at each moment according to the results of multiple simulations, and generate an availability simulation curve.

Description

[0001] Technical field [0002] The present invention provides an efficient simulation method based on the accessibility matrix and discrete event-driven system availability, in particular refers to a system reliability block diagram packaged as a reachability matrix, and then driven by discrete events to achieve system availability evaluation of the simulation method, belongs to the field of reliability engineering. Background [0003] Usability is one of the indicators of how well a system performs. It represents the probability that the t system is in a normal state at any one point, denoted as A(t). When a system is not repairable, the usability of the system is equal to its reliability R(t). Reliability Block Diagram (RBD) is an effective means of solving system availability / reliability. When the fault distribution and repair distribution of the unit do not follow the exponential distribution, the system usability cannot be resolved analytically. In this case, the simulation m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20
CPCG06F30/20
Inventor 冯强任羿孙博杨德真
Owner BEIHANG UNIV
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