發(fā)布時(shí)間：2018-12-18 01:11

【摘要】：基于排故過程模型構(gòu)建的虛擬維修訓(xùn)練系統(tǒng),能夠?yàn)闄C(jī)務(wù)人員提供高效、系統(tǒng)的排故訓(xùn)練,在機(jī)務(wù)人員培訓(xùn)領(lǐng)域得到廣泛應(yīng)用。現(xiàn)有的排故過程建模方法忽略了排故過程自身的結(jié)構(gòu)特點(diǎn),所建模型結(jié)構(gòu)復(fù)雜,仿真程序擴(kuò)展性、重用性差,制約了虛擬維修訓(xùn)練系統(tǒng)的發(fā)展。就此問題,論文采用離散事件建模方法BOM,以排故任務(wù)為模型元組件,逐層建立排故過程模型,并搭建3D仿真環(huán)境進(jìn)行模型仿真驗(yàn)證。結(jié)果證明,建立的模型能夠模擬真實(shí)的排故過程,滿足虛擬維修訓(xùn)練系統(tǒng)開發(fā)需求,解決了排故過程模型結(jié)構(gòu)復(fù)雜,仿真程序重用性不好的問題。本文的主要工作如下:首先,在研究飛機(jī)維護(hù)手冊的基礎(chǔ)上,總結(jié)排故過程的層次化、離散化特點(diǎn),利用離散事件建模思想抽象排故過程建模仿真要素。根據(jù)建模需求,提出層次化的建模策略和模型框架。比較常用離散事件建模方法在模型完備性、模型復(fù)雜程度方面的優(yōu)劣,選用BOM方法建立排故過程模型。其次,結(jié)合排故過程結(jié)構(gòu)特點(diǎn)和BOM方法組件化的建模特點(diǎn),以排故任務(wù)為模型元組件,使用BOM模板對其建模元素逐一描述,建立排故任務(wù)模型,根據(jù)排故過程層次結(jié)構(gòu),將排故任務(wù)模型進(jìn)行聚合建立完整的排故過程模型。針對BOM方法建立的排故過程模型存在語義歧義的缺點(diǎn),結(jié)合DEVS方法對BOM實(shí)體定義和狀態(tài)機(jī)模板進(jìn)行擴(kuò)展和改進(jìn)。使用擴(kuò)展后的BOM方法,重新建立排故過程實(shí)體狀態(tài)模型和排故過程實(shí)體狀態(tài)轉(zhuǎn)移模型。接下來,借助本實(shí)驗(yàn)室開發(fā)的A320虛擬維修訓(xùn)練平臺(tái),搭建排故過程模型3D仿真環(huán)境,闡述排故過程模型的仿真實(shí)現(xiàn)框架和程序結(jié)構(gòu)。通過運(yùn)行排故過程模型實(shí)例,驗(yàn)證排故過程模型和仿真方法的可行性。最后,借助BOM對HLA框架的支持,提出所建立的排故過程模型分布式仿真方法和仿真框架,對虛擬維修訓(xùn)練平臺(tái)的未來發(fā)展方向做了初步研究。結(jié)論,本文使用BOM方法建立的排故過程模型,能夠準(zhǔn)確、清晰的描述排故過程,提高了排故過程仿真程序的可重用性,達(dá)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.
【學(xué)位授予單位】：中國民航大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：V267;TP391.9

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