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System availability efficient simulation method based on reachable matrix and discrete event driven

A discrete event, simulation method technology, applied in design optimization/simulation, special data processing applications, instruments, etc., can solve problems such as the efficiency decline of system availability simulation

Active Publication Date: 2018-11-23
BEIHANG UNIV
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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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  • System availability efficient simulation method based on reachable matrix and discrete event driven
  • System availability efficient simulation method based on reachable matrix and discrete event driven
  • System availability efficient simulation method based on reachable matrix and discrete event driven

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Embodiment Construction

[0035] In order to gain a clearer understanding of the technical solutions, features and advantages of the present invention, a detailed description will be given below in conjunction with the accompanying drawings.

[0036] The present invention proposes an efficient simulation method of system availability based on reachability matrix and discrete event drive, which can be used for simulation analysis of complex system availability, and converts the availability state of the system into the reachability state of each unit failure and the system after maintenance. Then obtain its availability simulation value through discrete event driving and multiple simulations. Therefore, an efficient method is provided for the usability evaluation of the system. Overall structure of the present invention, see figure 1 shown. Its specific implementation steps are:

[0037] Step 1: Convert the Reliability Block Diagram (RBD) model to an adjacency matrix

[0038] The start and end of th...

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Abstract

The invention discloses a system availability efficient simulation method based on a reachable matrix and discrete event driven. The available state of a system is converted into the reachable state of the system after failure and maintenance of each unit, and an availability simulation value is obtained through the discrete event driven and many times of simulation, thereby improving the efficiency and effect of the availability simulation of a complex system. The method comprises the following steps: step 1, converting a Reliability Block Diagram of the system into an adjacent matrix for thenormal operation of the system; step 2, defining the number of times of simulation convergences; step 3, carrying out failure and maintenance time sampling on each unit in the system, and sequencingby time and generating a discrete event set; step 4, changing elements associated with the unit in the adjacency matrix based on unit failure events and maintenance events; step 5, solving the reachable matrix of each discrete event occurrence moment, and determining the available state of the system according to a reachability relationship between a start unit and an end unit; and step 6, calculating the availability of the system at each moment according to a result of many times of simulation, and generating an availability simulation curve.

Description

Technical field [0001] The present invention provides an efficient simulation method for system availability based on reachability matrix and discrete event drive, especially a simulation method that encapsulates the system reliability block diagram into reachability matrix, and then drives through discrete events to realize system availability evaluation , which belongs to the field of reliability engineering. Background technique [0002] Availability is one of the indicators to measure the performance of the system. It represents the probability that the system is in a normal state at any time t, denoted as A(t). When the system is not repairable, the availability of the system is equal to its reliability R(t). Reliability Block Diagram (RBD) is an effective means to solve system availability / reliability. When the failure distribution and maintenance distribution of the unit do not obey the exponential distribution, it will cause the system availability to be unable to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 冯强任羿孙博杨德真
Owner BEIHANG UNIV
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