基于离散事件的排故过程建模与仿真方法研究
发布时间：2018-12-18 01:11
【摘要】：基于排故过程模型构建的虚拟维修训练系统,能够为机务人员提供高效、系统的排故训练,在机务人员培训领域得到广泛应用。现有的排故过程建模方法忽略了排故过程自身的结构特点,所建模型结构复杂,仿真程序扩展性、重用性差,制约了虚拟维修训练系统的发展。就此问题,论文采用离散事件建模方法BOM,以排故任务为模型元组件,逐层建立排故过程模型,并搭建3D仿真环境进行模型仿真验证。结果证明,建立的模型能够模拟真实的排故过程,满足虚拟维修训练系统开发需求,解决了排故过程模型结构复杂,仿真程序重用性不好的问题。本文的主要工作如下:首先,在研究飞机维护手册的基础上,总结排故过程的层次化、离散化特点,利用离散事件建模思想抽象排故过程建模仿真要素。根据建模需求,提出层次化的建模策略和模型框架。比较常用离散事件建模方法在模型完备性、模型复杂程度方面的优劣,选用BOM方法建立排故过程模型。其次,结合排故过程结构特点和BOM方法组件化的建模特点,以排故任务为模型元组件,使用BOM模板对其建模元素逐一描述,建立排故任务模型,根据排故过程层次结构,将排故任务模型进行聚合建立完整的排故过程模型。针对BOM方法建立的排故过程模型存在语义歧义的缺点,结合DEVS方法对BOM实体定义和状态机模板进行扩展和改进。使用扩展后的BOM方法,重新建立排故过程实体状态模型和排故过程实体状态转移模型。接下来,借助本实验室开发的A320虚拟维修训练平台,搭建排故过程模型3D仿真环境,阐述排故过程模型的仿真实现框架和程序结构。通过运行排故过程模型实例,验证排故过程模型和仿真方法的可行性。最后,借助BOM对HLA框架的支持,提出所建立的排故过程模型分布式仿真方法和仿真框架,对虚拟维修训练平台的未来发展方向做了初步研究。结论,本文使用BOM方法建立的排故过程模型,能够准确、清晰的描述排故过程,提高了排故过程仿真程序的可重用性,达到了研究目的。
[Abstract]:The virtual maintenance training system based on the troubleshooting process model can provide efficient and systematic troubleshooting training for the crew, and it is widely used in the field of train crew training. The existing modeling methods ignore the structural characteristics of the troubleshooting process. The model is complex, the simulation program is extensible and the reusability is poor, which restricts the development of the virtual maintenance training system. In this paper, the discrete event modeling method (BOM,) is used to establish the model of troubleshooting process layer by layer, and the 3D simulation environment is built to verify the model. The results show that the established model can simulate the real troubleshooting process and meet the development requirements of the virtual maintenance training system. The problem of complex structure of the model and poor reusability of the simulation program is solved. The main work of this paper is as follows: firstly, based on the study of aircraft maintenance manual, the hierarchical and discretization characteristics of the process of troubleshooting are summarized, and the elements of modeling and simulation of the process are abstracted by the idea of discrete event modeling. According to the modeling requirements, a hierarchical modeling strategy and a model framework are proposed. This paper compares the advantages and disadvantages of discrete event modeling methods in terms of model completeness and model complexity. BOM method is used to establish the model of troubleshooting process. Secondly, according to the characteristics of the process structure and the componentized modeling of the BOM method, taking the troubleshooting task as the model meta-component, using the BOM template to describe the modeling elements one by one, the model of the troubleshooting task is established, according to the hierarchical structure of the troubleshooting process. A complete model of troubleshooting process is established by aggregating the task model. Aiming at the disadvantage of semantic ambiguity in the model of troubleshooting process established by BOM method, the definition of BOM entity and the template of state machine are extended and improved with DEVS method. The extended BOM method is used to re-establish the entity state model and the entity state transition model of the exclusion process. Then, with the help of the A320 virtual maintenance training platform developed by our laboratory, the 3D simulation environment of the troubleshooting process model is built, and the simulation implementation framework and the program structure of the model are expounded. The feasibility of the model and the simulation method are verified by the example of running the troubleshooting process model. Finally, with the support of BOM to the HLA framework, the distributed simulation method and simulation framework of the troubleshooting process model are proposed, and the future development direction of the virtual maintenance training platform is preliminarily studied. Conclusion: the model of troubleshooting process established by BOM method in this paper can describe the process accurately and clearly, improve the reusability of the simulation program, and achieve the purpose of the research.
【学位授予单位】：中国民航大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：V267;TP391.9
本文编号：2385062
[Abstract]:The virtual maintenance training system based on the troubleshooting process model can provide efficient and systematic troubleshooting training for the crew, and it is widely used in the field of train crew training. The existing modeling methods ignore the structural characteristics of the troubleshooting process. The model is complex, the simulation program is extensible and the reusability is poor, which restricts the development of the virtual maintenance training system. In this paper, the discrete event modeling method (BOM,) is used to establish the model of troubleshooting process layer by layer, and the 3D simulation environment is built to verify the model. The results show that the established model can simulate the real troubleshooting process and meet the development requirements of the virtual maintenance training system. The problem of complex structure of the model and poor reusability of the simulation program is solved. The main work of this paper is as follows: firstly, based on the study of aircraft maintenance manual, the hierarchical and discretization characteristics of the process of troubleshooting are summarized, and the elements of modeling and simulation of the process are abstracted by the idea of discrete event modeling. According to the modeling requirements, a hierarchical modeling strategy and a model framework are proposed. This paper compares the advantages and disadvantages of discrete event modeling methods in terms of model completeness and model complexity. BOM method is used to establish the model of troubleshooting process. Secondly, according to the characteristics of the process structure and the componentized modeling of the BOM method, taking the troubleshooting task as the model meta-component, using the BOM template to describe the modeling elements one by one, the model of the troubleshooting task is established, according to the hierarchical structure of the troubleshooting process. A complete model of troubleshooting process is established by aggregating the task model. Aiming at the disadvantage of semantic ambiguity in the model of troubleshooting process established by BOM method, the definition of BOM entity and the template of state machine are extended and improved with DEVS method. The extended BOM method is used to re-establish the entity state model and the entity state transition model of the exclusion process. Then, with the help of the A320 virtual maintenance training platform developed by our laboratory, the 3D simulation environment of the troubleshooting process model is built, and the simulation implementation framework and the program structure of the model are expounded. The feasibility of the model and the simulation method are verified by the example of running the troubleshooting process model. Finally, with the support of BOM to the HLA framework, the distributed simulation method and simulation framework of the troubleshooting process model are proposed, and the future development direction of the virtual maintenance training platform is preliminarily studied. Conclusion: the model of troubleshooting process established by BOM method in this paper can describe the process accurately and clearly, improve the reusability of the simulation program, and achieve the purpose of the research.
【学位授予单位】：中国民航大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：V267;TP391.9
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