【摘要】：進(jìn)入21世紀(jì),社會的競爭歸根結(jié)底就是人才的競爭,尤其是創(chuàng)新型人才的競爭。機(jī)械原理作為大學(xué)機(jī)械類本科生所必修的主干專業(yè)課程之一,也有著為社會培養(yǎng)創(chuàng)新型人才的責(zé)任。隨著近年來高校大規(guī)模擴(kuò)招,如何解決資金投入與人才培養(yǎng)之間的矛盾也越來越突出。近年來,尤其是進(jìn)入21世紀(jì)以來計算機(jī)技術(shù)和信息技術(shù)的飛速發(fā)展,使得基于計算機(jī)技術(shù)的虛擬現(xiàn)實技術(shù)也得到了質(zhì)的飛躍,由于虛擬現(xiàn)實技術(shù)的沉浸性、構(gòu)想性、交互性三大特征,若把虛擬現(xiàn)實技術(shù)應(yīng)用到機(jī)械原理創(chuàng)新教學(xué)和創(chuàng)新設(shè)計中,不僅可以大大減少資金的投入,而且還可以為學(xué)生對機(jī)構(gòu)的認(rèn)知分析和創(chuàng)新設(shè)計提供一個平臺,激發(fā)他們的學(xué)習(xí)興趣和創(chuàng)新設(shè)計的意識。本文即是研究創(chuàng)建這樣一個創(chuàng)新平臺,主要可以分為兩大部分,一是基于虛擬現(xiàn)實的機(jī)構(gòu)認(rèn)知分析,二是建立連桿機(jī)構(gòu)創(chuàng)新設(shè)計平臺。 機(jī)構(gòu)認(rèn)知分析針對機(jī)光電液壓一體化柔性制造系統(tǒng)中的三個獨(dú)立單元,利用Pro/e建立模型并裝配模型,通過特定的導(dǎo)入格式,把在Pro/e中裝配好的模型導(dǎo)入到3ddsMax中,并根據(jù)每個單元中的機(jī)構(gòu)的不同運(yùn)動原理,分別采用不同的方式進(jìn)行動畫制作。用3dsMax exporter. Exe插件把3dsMax中做的動畫以及模型生成可以在Virtools中打開的.nmo格式。在Virtools中為每個單元添加交互行為BB模塊和操作按鈕(2維幀),同時,添加第一人稱攝像機(jī),以達(dá)到使用戶有身臨其境的感覺。制作完成的界面最終發(fā)布成Web網(wǎng)頁形式。利用本平臺,可使學(xué)生從不同角度對機(jī)構(gòu)進(jìn)行認(rèn)知和分析。 連桿機(jī)構(gòu)創(chuàng)新平臺則克服了本科生數(shù)學(xué)等知識的限制,為學(xué)生提供一個設(shè)計平面連桿機(jī)構(gòu)平臺。平臺主要包括實現(xiàn)給定的連桿位置和再現(xiàn)運(yùn)動軌跡兩種情況。實現(xiàn)給定的連桿位置,由定長約束方程和定斜率約束方程可知。當(dāng)給定的連桿的位置數(shù)為3時,預(yù)先選定一些未知數(shù)作為已知,把非線性問題轉(zhuǎn)化為線性問題來解決,當(dāng)給定的連桿位置數(shù)4-5個時,采用數(shù)值解法。再現(xiàn)給定運(yùn)動軌跡,未知數(shù)要比實現(xiàn)給定連桿位置的多,所以采用優(yōu)化的方法求解。C#語言編寫創(chuàng)新平臺界而,并對在建立平臺過程中需要解決的關(guān)鍵問題進(jìn)行分析解決。
[Abstract]:In the 21 st century, the competition of society is the competition of talents, especially the competition of creative talents. As one of the main courses of mechanical undergraduate students, mechanical principle also has the responsibility of cultivating innovative talents for the society. With the large-scale enrollment expansion in colleges and universities in recent years, how to solve the contradiction between capital investment and talent training is becoming more and more prominent. In recent years, especially in the 21st century, with the rapid development of computer technology and information technology, virtual reality technology based on computer technology has also got a qualitative leap. If the virtual reality technology is applied to the innovative teaching and design of mechanical principles, it can not only greatly reduce the investment of funds, but also provide a platform for students' cognitive analysis and innovative design of institutions. Stimulate their interest in learning and innovative design awareness. This paper is to study the creation of such an innovative platform, mainly can be divided into two parts, one is based on virtual reality mechanism cognitive analysis, the other is to establish a linkage mechanism innovation design platform. According to the three independent units in the integrated flexible manufacturing system of optoelectronic hydraulic system, the mechanism cognitive analysis uses Pro/e to establish the model and assemble the model. Through the special import format, the model assembled in Pro/e is imported into 3ddsMax. According to the different motion principle of the mechanism in each unit, the animation is made in different ways. Using 3dsMax exporter. Exe Plug-in animates in 3dsMax and builds models in. Nmo format that can be opened in Virtools. The interactive behavior BB module and the operation button (2 dimensional frame) are added to each unit in Virtools, and the first person camera is added to make the user feel on the spot. The finished interface is finally published in the form of a Web web page. Using this platform, students can recognize and analyze institutions from different angles. The innovative platform of connecting rod mechanism overcomes the limitation of mathematics knowledge of undergraduate students and provides a design plane linkage mechanism platform for students. The platform mainly includes two kinds of cases: realizing the given connecting rod position and reproducing the motion track. The fixed length constraint equation and the fixed slope constraint equation are used to realize the given connecting rod position. When the position number of a given connecting rod is 3, some unknown numbers are selected as known in advance, and the nonlinear problem is transformed into a linear problem to be solved. When the given connecting rod position number is 4-5, the numerical solution is adopted. For reproducing a given trajectory, the unknown number is more than that of realizing a given connecting rod position. Therefore, the optimization method is used to solve the problem. C # language is used to program the innovative platform boundary, and the key problems that need to be solved in the process of building the platform are analyzed and solved.
【學(xué)位授予單位】：山東大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2012
【分類號】：TH122;TP391.9

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