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Simulation method for equipment maintenance and guarantee based on Petri network model

A simulation method and equipment technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problem of no modeling and analysis Petri net analysis software, damage and maintenance time obey different distributions, transition rules and analysis Different goals and other problems, to achieve the effect of intuitive modeling form, diverse distribution types, and flexible expression methods

Inactive Publication Date: 2009-07-08
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

[0004] However, since the introduction of Petri nets into the modeling and analysis of equipment maintenance support is still in its infancy, many current studies on the use of Petri nets to model and simulate maintenance support processes only stay at the stage of graphical modeling, lacking further simulation analysis
Moreover, different Petri nets and analysis tools have different transition rules and analysis objectives, and there is no Petri net analysis software suitable for modeling and analysis of equipment maintenance support processes
There are also some analysis studies based on the stochastic Petri net of Molloy form, which introduces the time delay that obeys the exponential distribution in the transition of the Petri net, so that the model has the mathematical property of isomorphism with the Markov chain, which is convenient for analysis, but for For complex equipment systems, the damage and maintenance time of various components obey different distributions rather than just exponential distributions, so this method also has great limitations

Method used

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  • Simulation method for equipment maintenance and guarantee based on Petri network model
  • Simulation method for equipment maintenance and guarantee based on Petri network model
  • Simulation method for equipment maintenance and guarantee based on Petri network model

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Embodiment Construction

[0038] The present invention will be further described below in conjunction with accompanying drawing.

[0039] This embodiment includes the following specific steps:

[0040] (1) Establish the Petri net model of equipment maintenance support.

[0041] PN=(S, T; F, I, K, W, V, M 0 ) is an octet where:

[0042] S={s 1 ,s 2 ,s 3 ,K,s m} is a non-empty finite set of places;

[0043] T={t 1 , t 2 , t 3 ,K,t n} is a transition set, which contains time distribution type and parameters;

[0044] F is the set of transition input arcs and output arcs;

[0045] I is the set of inhibition arcs;

[0046] K: S→N + U{∞} is the place capacity function, N + ={1,2,3,...};

[0047] W=F→N + is the arc weight function;

[0048] V=I→N + is the arc weight function;

[0049] m 0 : S→N is the initial identifier, N={0, 1, 2,...};

[0050] In order to illustrate the method of Petri nets to establish the equipment maintenance guarantee process model and clarify the components and t...

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Abstract

The invention discloses a method for simulating the equipment maintenance support based on Petri network model. The method comprises the following steps: the Petri network process modeling is performed through distributing given equipment use and maintenance process to each event occurrence time; the time and the simulation frequency are given on the basis of modeling; the simulation analysis is performed on the established Petri network model; and finally, the availability of system / equipment during the task period, the working strength of maintenance man or the task ending time is obtained, and the maintenance support scheme can be evaluated accordingly, so as to provide scientific basis for solution selection and resource allocation.

Description

technical field [0001] The invention relates to a simulation method for equipment maintenance support, in particular to a simulation method for equipment maintenance support based on a Petri net model. Background technique [0002] In the process of equipment use and maintenance, the determination of support programs and maintenance resources plays a vital role. An appropriate solution selection can increase the service life of equipment and create more production value; reasonable resource allocation can effectively reduce the cost without affecting the use of equipment. The main basis for determining the support plan is the analysis of the use and maintenance tasks. For complex equipment systems, the damage and maintenance time of various components obey different distributions. It is used in the case of concurrent activities and resource sharing in the maintenance process. Use analytical methods to determine maintenance resources during the use and maintenance of complex...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 徐永成杨拥民李岳宋昆陈循
Owner NAT UNIV OF DEFENSE TECH
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