本文選題：虛擬實(shí)驗(yàn) + 機(jī)械學(xué)科�。� 參考：《上海交通大學(xué)》2012年碩士論文

【摘要】：機(jī)械學(xué)科實(shí)驗(yàn)教學(xué)是機(jī)械專業(yè)教學(xué)重要的教學(xué)內(nèi)容，是使學(xué)生在學(xué)好基本理論和基本技能的同時(shí)，培養(yǎng)學(xué)生創(chuàng)新精神和動(dòng)手能力，提高學(xué)生綜合素質(zhì)的重要途徑。傳統(tǒng)的實(shí)物實(shí)驗(yàn)教學(xué)已經(jīng)不能滿足當(dāng)前實(shí)驗(yàn)教學(xué)的需求，為緩解實(shí)驗(yàn)器材不足、設(shè)備老化等問題，同時(shí)還為培養(yǎng)學(xué)生的創(chuàng)新能力，機(jī)械學(xué)科虛擬實(shí)驗(yàn)的研究為該問題的解決提供的途徑。 機(jī)械學(xué)科實(shí)驗(yàn)不單單局限于純機(jī)械領(lǐng)域，相當(dāng)一部分實(shí)驗(yàn)體現(xiàn)了多個(gè)領(lǐng)域知識(shí)的綜合應(yīng)用。目前廣泛使用的虛擬試驗(yàn)建模方法存在建模速度慢，模型局限性強(qiáng)，往往針對(duì)特定實(shí)驗(yàn)或者特定領(lǐng)域。多領(lǐng)域統(tǒng)一建模方法的研究將有利于虛擬實(shí)驗(yàn)平臺(tái)的推廣應(yīng)用。 本文在深入分析多領(lǐng)域統(tǒng)一建模方法以及機(jī)械學(xué)科虛擬實(shí)驗(yàn)現(xiàn)狀與不足的基礎(chǔ)上，進(jìn)行了以下研究： 首先，通過分析Modelica統(tǒng)一建模語言的特點(diǎn)及其使用方法的基礎(chǔ)上，，對(duì)機(jī)械學(xué)科實(shí)驗(yàn)進(jìn)行了歸納，建立了機(jī)械學(xué)科虛擬實(shí)驗(yàn)構(gòu)件模型并形成構(gòu)件庫(kù)，同時(shí)分析了構(gòu)件三維模型與Modelica邏輯模型的內(nèi)在聯(lián)系，提出了機(jī)械學(xué)科實(shí)驗(yàn)構(gòu)件的完整模型表達(dá)。 其次，通過研究Modelica邏輯模型的特點(diǎn)，提出了利用XML語言統(tǒng)一存儲(chǔ)Modelica邏輯模型和三維可視化模型部分信息的數(shù)據(jù)結(jié)構(gòu)并制定了相應(yīng)的數(shù)據(jù)結(jié)構(gòu)規(guī)范，提出通過遍歷Modelica庫(kù)并利用Modelica平坦模型獲取Modelica模型信息的方法。此外，通過分析場(chǎng)景XML模型結(jié)構(gòu)，提出了將場(chǎng)景XML模型轉(zhuǎn)換成可求解的Modelica模型的方法。為虛擬實(shí)驗(yàn)平臺(tái)、Modelica邏輯模型和三維可視化模型三個(gè)獨(dú)立模塊搭建了信息傳遞的橋梁。 再次，通過分析plt結(jié)果文件的特點(diǎn)，提出了儲(chǔ)存虛擬實(shí)驗(yàn)場(chǎng)景求解結(jié)果的XML數(shù)據(jù)格式。通過分析OSG矩陣轉(zhuǎn)換的特點(diǎn)，提出了XML結(jié)果數(shù)據(jù)與場(chǎng)景中構(gòu)件之間的映射方法，解決了虛擬實(shí)驗(yàn)平臺(tái)的最后一個(gè)技術(shù)問題。 最后，在上述方法與技術(shù)研究的基礎(chǔ)上，開發(fā)了一套機(jī)械學(xué)科虛擬實(shí)驗(yàn)構(gòu)件多領(lǐng)域統(tǒng)一建模與組裝平臺(tái)，并應(yīng)用于機(jī)械學(xué)科虛擬實(shí)驗(yàn)中，通過應(yīng)用示范，驗(yàn)證了本文所述方法的正確性與有效性。
[Abstract]:The experimental teaching of mechanical discipline is an important teaching content of mechanical specialty teaching. It is an important way for students to learn basic theory and skills well, to cultivate students' creative spirit and practical ability, and to improve students' comprehensive quality at the same time.The traditional physical experimental teaching can not meet the needs of the current experimental teaching. In order to alleviate the problems of insufficient experimental equipment, aging of the equipment and so on, it is also necessary to cultivate the students' innovative ability.The research of virtual experiment in mechanical discipline provides a way to solve this problem.Mechanical experiments are not confined to the pure mechanical field. A large number of experiments reflect the comprehensive application of multi-domain knowledge.At present, the widely used virtual experiment modeling method has the characteristics of slow modeling speed and strong model limitation, which is often aimed at specific experiments or specific fields.The research of multi-domain unified modeling method will be beneficial to the popularization and application of virtual experiment platform.Based on the in-depth analysis of the multi-domain unified modeling method and the present situation and shortcomings of the virtual experiment in mechanical discipline, the following studies are carried out in this paper:Firstly, on the basis of analyzing the characteristics of Modelica and its application methods, the experiment of mechanical discipline is summarized, and the component model of virtual experiment of mechanical discipline is established and the component library is formed.At the same time, the relationship between the 3D component model and the Modelica logical model is analyzed, and the complete model representation of the experimental component in mechanical discipline is proposed.Secondly, by studying the characteristics of Modelica logical model, this paper proposes a unified data structure of storing part of information of Modelica logic model and 3D visual model by using XML language and formulates corresponding data structure specification.A method of obtaining Modelica model information by traversing Modelica library and using Modelica flat model is presented.In addition, by analyzing the structure of scene XML model, a method of transforming scene XML model into solvable Modelica model is proposed.A bridge of information transmission is built for the three independent modules of virtual experimental platform, namely, the Modelica logical model and the 3D visualization model.Thirdly, by analyzing the characteristics of plt result file, a XML data format for storing the result of virtual experiment scene is proposed.By analyzing the characteristics of OSG matrix transformation, a mapping method between the XML result data and the components in the scene is proposed, which solves the last technical problem of the virtual experimental platform.Finally, on the basis of the research of the above methods and techniques, a set of multi-domain unified modeling and assembly platform for the virtual experimental components of mechanical discipline is developed, and applied in the virtual experiment of mechanical discipline, through the application demonstration,The correctness and validity of the proposed method are verified.
【學(xué)位授予單位】：上海交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2012
【分類號(hào)】：TH11-4;TP391.9

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