【摘要】：近幾年來(lái),虛擬現(xiàn)實(shí)技術(shù)發(fā)展迅速并已應(yīng)用于各行各業(yè)。虛擬裝配技術(shù)(Virtual Assembly)技術(shù)是虛擬現(xiàn)實(shí)技術(shù)在傳統(tǒng)制造業(yè)的典型應(yīng)用。傳統(tǒng)的虛擬裝配技術(shù)需要設(shè)計(jì)人員在虛擬裝配系統(tǒng)和三維建模軟件中反復(fù)導(dǎo)入和修改模型。如果能夠在裝配過(guò)程中,讓模型自己進(jìn)行外形或者參數(shù)的修正,而且用戶也可以根據(jù)自己的想法“親手”參與外觀的設(shè)計(jì),這將大大縮短產(chǎn)品設(shè)計(jì)周期,提高生產(chǎn)效率,而且能夠給用戶帶來(lái)直覺化的交互體驗(yàn)。這對(duì)于提高我國(guó)制造業(yè)水平具有十分重要的意義。本文的研究?jī)?nèi)容就是虛擬裝配過(guò)程中零件的變形技術(shù)。本文在分析現(xiàn)有的三維物體變形技術(shù)的基礎(chǔ)上,提出了適用于虛擬裝配的基于加權(quán)平均法線的變形方法。該方法通過(guò)改變網(wǎng)格模型表面的頂點(diǎn)位置來(lái)實(shí)現(xiàn)三維物體的變形,在變形過(guò)程中使用加權(quán)平均法線來(lái)確定網(wǎng)格頂點(diǎn)的位移方向,使變形效果更加真實(shí),并且使用高斯分布函數(shù)來(lái)計(jì)算各網(wǎng)格頂點(diǎn)的移動(dòng)變化因子,使變形效果更加光滑。最后,本文基于Unity3D和Leap Motion開發(fā)了一個(gè)直覺化交互系統(tǒng),以驗(yàn)證該方法的有效性。通過(guò)直覺化交互系統(tǒng)中的六個(gè)場(chǎng)景及實(shí)驗(yàn)的驗(yàn)證,發(fā)現(xiàn)該方法實(shí)現(xiàn)簡(jiǎn)單,計(jì)算速度快,能滿足實(shí)時(shí)變形的要求,而且有良好的變形效果,并為進(jìn)一步研究虛擬裝配建模技術(shù)奠定了理論基礎(chǔ)。
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[Abstract]:In recent years, virtual reality technology has developed rapidly and has been applied to all walks of life. Virtual Assembly technology is a typical application of virtual reality technology in the traditional manufacturing industry. The traditional virtual assembly technology requires the designer to repeatedly import and modify the model in the virtual assembly system and the three-dimensional modeling software. if the model can be modified by the shape or the parameter in the assembling process, and the user can participate in the design of the appearance according to the own idea "hand", the product design period can be greatly shortened, the production efficiency is improved, But also can bring an intuitive interactive experience to the user. This is of great significance to improve the manufacturing level of our country. The research content of this paper is the deformation technology of parts during the process of virtual assembly. Based on the analysis of the existing three-dimensional object deformation technology, this paper presents a method of deformation based on weighted average normal for virtual assembly. The method realizes the deformation of the three-dimensional object by changing the vertex position of the surface of the mesh model, And a Gaussian distribution function is used to calculate the movement change factors of each mesh vertex, so that the deformation effect is more smooth. Finally, this paper develops an intuitive interaction system based on Unity3D and Leap Motion to verify the effectiveness of the method. Through the verification of six scenes and experiments in the intuitive interaction system, it is found that the method is simple, the calculation speed is fast, the requirement of real-time deformation can be met, and the deformation effect is good, and the theoretical foundation is laid for further research of the virtual assembly modeling technology.
【學(xué)位授予單位】：北京郵電大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類號(hào)】：TP391.9

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本文編號(hào)：2510208