本文關(guān)鍵詞： 裝配序列規(guī)劃 剛?cè)峄旌袭a(chǎn)品 碰撞檢測(cè) 裝配建模 分散搜索算法　出處：《合肥工業(yè)大學(xué)》2017年碩士論文　論文類(lèi)型：學(xué)位論文

【摘要】：裝配序列規(guī)劃是產(chǎn)品研發(fā)過(guò)程中的最后階段,合理且優(yōu)化的產(chǎn)品裝配序列可以顯著的減少產(chǎn)品研發(fā)周期,提高裝配質(zhì)量,降低裝配成本。隨著科技的進(jìn)步,越來(lái)越多的現(xiàn)代機(jī)電產(chǎn)品,除包含剛性零件以外,還有一些柔性零件。對(duì)于這類(lèi)剛?cè)峄旌袭a(chǎn)品,現(xiàn)有的裝配規(guī)劃方法很難規(guī)劃出一個(gè)合理可行的裝配序列。本文針對(duì)剛?cè)峄旌袭a(chǎn)品裝配序列規(guī)劃的特點(diǎn)及其目前存在的問(wèn)題上,探討研究了碰撞干涉檢測(cè)技術(shù)和剛?cè)峄旌袭a(chǎn)品的裝配模型,并以此為基礎(chǔ)提出了剛?cè)峄旌袭a(chǎn)品裝配序列規(guī)劃的解決方案。碰撞檢測(cè)技術(shù)是裝配序列規(guī)劃問(wèn)題的重要組成部分,快速高效的檢測(cè)零件之間的碰撞是碰撞檢測(cè)的難點(diǎn)和重點(diǎn)。論文分析研究了干涉領(lǐng)域的包圍盒技術(shù)、粗略碰撞檢測(cè)技術(shù)、基于包圍盒十字相交的干涉判斷等方法,這些方法是裝配序列規(guī)劃過(guò)程中干涉矩陣提取的基礎(chǔ)。產(chǎn)品裝配信息建模是實(shí)現(xiàn)裝配規(guī)劃的基礎(chǔ),裝配信息的完整和準(zhǔn)確地表示以及管理是實(shí)現(xiàn)高效裝配序列規(guī)劃的前提條件。裝配信息建模是對(duì)零件信息、工具信息等裝配信息進(jìn)行管理,并對(duì)初始設(shè)計(jì)模型的信息進(jìn)行提取和重新組織,建立一套完整可靠的信息數(shù)據(jù)模型,為后續(xù)的裝配序列規(guī)劃工作提供必要的數(shù)據(jù)準(zhǔn)備和支持。在解決剛?cè)峄旌闲彤a(chǎn)品裝配序列規(guī)劃方面,論文首先根據(jù)裝配干涉矩陣在裝配領(lǐng)域的應(yīng)用提出并定義了裝配應(yīng)力矩陣的概念,并通過(guò)裝配應(yīng)力矩陣將零件之間的干涉情況進(jìn)行數(shù)字化。采用有限元的方法模擬剛性零件和柔性零件以及兩柔性零件之間的裝配過(guò)程,記錄裝配過(guò)程中的最大應(yīng)力并判斷是否超過(guò)該零件的屈服應(yīng)力,以此作為判斷具有柔性零件的裝配是否干涉的依據(jù)。其次本文重新設(shè)計(jì)了對(duì)應(yīng)于裝配應(yīng)力矩陣的分散搜索算法,給出了解的表達(dá)方式,以裝配方向的改變次數(shù)和總的最大應(yīng)力次數(shù)作為目標(biāo)函數(shù)并給出了其計(jì)算方法。設(shè)計(jì)了初始解的多樣化生成方法和解的提高方法,給出了參考集的選擇、更新、子集的產(chǎn)生方式。結(jié)合實(shí)例列出了部分交叉、有序交叉、兩點(diǎn)交叉的重組方式。在參數(shù)的選擇上采用了田口方法和TOPSIS法相結(jié)合,根據(jù)參數(shù)類(lèi)型以及水平數(shù)列出了試驗(yàn)的正交矩陣,然后確定最優(yōu)參數(shù)值。最后結(jié)合實(shí)例驗(yàn)證了裝配應(yīng)力矩陣在解決剛?cè)峄旌袭a(chǎn)品序列規(guī)劃的可行性以及分散搜索算法的高效性。
[Abstract]:Assembly sequence planning is the last stage in the process of product development. Reasonable and optimized product assembly sequence can significantly reduce product development cycle, improve assembly quality and reduce assembly cost. More and more modern mechanical and electrical products, in addition to the rigid parts, there are some flexible parts. For this kind of rigid and flexible hybrid products. It is very difficult for the existing assembly planning methods to plan a reasonable and feasible assembly sequence. This paper aims at the characteristics of the assembly sequence planning of rigid and flexible mixed products and the existing problems. The collision interference detection technology and the assembly model of rigid and flexible products are studied. On this basis, a solution to assembly sequence planning of rigid and flexible mixed products is proposed. Collision detection is an important part of assembly sequence planning. It is difficult and important to detect collision between parts quickly and efficiently. The bounding box technology and rough collision detection technology in the field of interference are analyzed and studied in this paper. Based on bounding box cross interference judgment and other methods, these methods are the basis of interference matrix extraction in assembly sequence planning. Product assembly information modeling is the basis of assembly planning. The complete and accurate representation and management of assembly information is a prerequisite for efficient assembly sequence planning. Assembly information modeling is the management of assembly information such as part information and tool information. The information of the initial design model is extracted and reorganized, and a set of complete and reliable information data model is established. To provide necessary data preparation and support for subsequent assembly sequence planning. Firstly, according to the application of assembly interference matrix in assembly field, the concept of assembly stress matrix is proposed and defined. The interference between parts is digitized by assembly stress matrix, and the assembly process between rigid parts, flexible parts and two flexible parts is simulated by finite element method. Record the maximum stress during assembly and determine whether it exceeds the yield stress of the part. This is used as the basis for judging whether the assembly of flexible parts interfere. Secondly, this paper redesigns the decentralized search algorithm corresponding to assembly stress matrix, and gives the expression of the solution. Taking the changing times of assembly direction and the total maximum stress times as the objective function, the calculation method is given. The method of multiplicity generation of initial solution and the improvement method are designed, and the selection and update of reference set are given. The generation of subsets. Combined with examples listed partial crossover, ordered crossover, two-point crossover recombination. In the selection of parameters using the Taguchi method and TOPSIS method combined. The orthogonal matrix of the experiment is given according to the type of parameters and the horizontal number. Finally, the feasibility of assembly stress matrix in solving the sequence planning of rigid-flexible mixed products and the efficiency of decentralized search algorithm are verified.
【學(xué)位授予單位】：合肥工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TG95;TP18

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