• CN:11-2187/TH
  • ISSN:0577-6686

›› 2011, Vol. 47 ›› Issue (10): 185-191.

• 论文 • 上一篇    下一篇

基于着色随机时间Petri网的维修性建模方法

陆中;孙有朝;吴海桥   

  1. 南京航空航天大学民航学院
  • 发布日期:2011-05-20

System Maintainability Modeling Method Based on Colored Stochastic Time Petri Net

LU Zhong;SUN Youchao;WU Haiqiao   

  1. Civil Aviation Collage, Nanjing University of Aeronautics and Astronautics
  • Published:2011-05-20

摘要: 产品的维修性是决定其维修品质与寿命周期费用的关键因素,维修性建模是维修性设计的重要环节,对产品的维修性水平有重要影响。对维修性建模方法进行深入研究:利用着色随机时间Petri网的库所与颜色标记等基本要素描述维修对象、维修资源等维修实体及其状态,基于库所、颜色标记、随机时间变迁等基本要素给出维修实体状态与维修作业关系以及维修作业逻辑关系的描述方法,并以此为基础构建基于着色随机时间Petri网的维修过程模型。根据该模型提出基于蒙特卡罗法的维修时间仿真算法以及维修资源需求量计算方法。结合某型飞机前起落架系统给出维修过程建模与维修时间仿真、维修资源需求量计算实例,表明模型与方法的优越性。

关键词: Petri网, 蒙特卡罗法, 维修过程, 维修性建模, 维修性评估

Abstract: Maintainability is a critical factor that will decide the maintenance quality and life cycle cost of product. Maintainability modeling plays an important role in maintainability design, and it affects maintainability of product significantly. Maintainability modeling method is deeply studied:Maintenance entities including maintenance object, maintenance resources and their status are described by places and colored tokens which are basic elements of colored stochastic time Petri net; the description method of relationship between maintenance entities and maintenance tasks, and logic relationship of maintenance tasks are also given with the basic elements including places, colored tokens and stochastic time transitions; and the colored stochastic time Petri net based maintenance process model is built on the basis of the above mentioned work. According to the model, maintenance time simulation algorithm based on Monte Carlo method is proposed, as well as demand quantity calculating method of maintenance resources. At last, an application case of maintenance process modeling, maintenance time simulation and maintenance resources demand calculation combined with nose landing gear system of a certain type of aircraft is given to illustrate the superiority of the model and method.

Key words: Maintainability evaluation, Maintainability modeling, Maintenance process, Monte Carlo method, Petri net

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