【機械類畢業(yè)論文中英文對照文獻翻譯】計算機輔助汽車設(shè)計技術(shù)的發(fā)展以及人工智能、知識工程,機械類畢業(yè)論文中英文對照文獻翻譯,機械類,畢業(yè)論文,中英文,對照,對比,比照,文獻,翻譯,計算機輔助,汽車,設(shè)計,技術(shù),發(fā)展,以及,人工智能,知識工程 附　　錄 This dissertationfirstly givesa review of thedevelopmentof automotivedesigntechnology the evelopment of artificial in telligence and knowledge based engineeringand their applicationto automotive overalldesign．Withtheanalysisof content and feature ofoverall design and the analysis of artificiaI intelligence．a(chǎn)utomotive overalIdesigniS divided into fourrelatively independent part overalIparameterdesignIayout design performance calculation and analyssand comprehensive evaluation．Method for each part iS also given in detail．Thus framework of application ofknowledge?basedengineering to automotive overall design jS constructed．With theanalysis of current parameter statisticaI analysis method fuzzy comprehensiveevaluation based parameterstatisticaI analysis method iS given．The result based onfuzzy comprehensive evaluation method iS more valuable than theoriginalmethod．After discussion on the characteristic of automotive overalIparameter,basedon modernoptimizationmethods and casebasedreasoning with the definition ofdegreeof similarrelation．studyofgenetic algorithm based automotive overalI parameter design iS conducted based on vehicle case．Aiming at contents and characteristics of automotive layout design．a(chǎn)fter establishment of automotive Iayout components tree and rule forcomponents assembly method．a(chǎn)utomotive Iayout assembly design method iS constructed with the use of parametricdesignmethod andassociativity?driving techniquesofUnigraphics software based on Unigraphics developmenttoolkit．And jt realizes modularized assembly of automotivecomponents in three．dimensionaI virtual environment and their parametric modification withassociativityo InAddition applicationof models to thedesignand analysisof automotive iSprimarilydescribed Based on theanalysisof leafspring bendingfeature understresswiththe combination of two arcs with differentsignof 2- order differential coefficient．Ieaf spring3-d geometric model for Iimjt position interferenceanalysisiS established based onUnigraphicsand itsdevelopmenttoolkit． System integration method for knowledgebased automotive overalI designiS also given jn the end of the dissertationand systemofknowledge．basedautomotive overalIdesigniS constructed． Key Words automobile overall design knowledgebasedengineering fuzzy comprehensive evaluation statistical analysis genetic algorithm layoutdesign assembly application development model systemintegrationin order to achieve in automobile product design stage certain parameters, such as modelling, vehicle performance goals and the end Into car design of car after the main parts must undertake decorating design work. This work is each skillArt department coordinate result is departments of design work further guidance and goals.The layout design to solve is the main position in space and Buy, some of these components in decorate on to meet the scheme design of defined in the therelationship between the various components, overall coordination mutual bits requirements of vehicle parameters, or the wholeCar should rely on some components on parameters of the layout to realize. Through the general layout design work, designers put preliminaryFormed in the design idea of certain forms (general arrangement sketches, 3d total assembly body etc) specific expression comes out, itThought transformation for specific physical from the first step.Car design from the vehicle to assembly, again from Then gradually to materialize. Overall, and by local composition in local design, should be in the whole from itsThe position and role of the whole, consider starting among local, the relationship among the clear boundary conditions,To avoid parts appear not harmonious phenomenon. Visible, overall layout of automobile design quality, car performanceAnd product vitality plays a very important role.Because parts design layout in vehicle begins after complete basic layout design stage, in oftenSo when decorating a setPlans to appear on the map is the main control points, main assembly lines, including important external contour line and by theseContour line of control surfaces and exercise constitutes limit position, etc. These points called Hard points (point), heavy. LotThe assembly to the surface called Hard surface profile surface), general (hard-core also have these control elements referred to as Hard points(point), including a lot of key parts and whole various control point, line, face, etc. In a car's general arrangementDesign, hard point position is first to determine down by soliciting relevant designdepartment, the opinion, in charge of the productionProduct design, discussion leaders join demand. Hard point once determined, is no longer easy updates, become further asherMillions of basis. assembly to parts of the design process, namely first have overall concept, Design hard points constitute the layout design of automobile frame. It can be said that the process of layout design carDesign is hard points continually clear, gradually determine dynamic process. Earlier, car determination of layout hard pointsMostly in drawing two-dimensional condition through the wireframe to realize drawing. Along with the development of CAD technology, the totalLayout design hard point indeed in 3d state nor tend to, and can directly use the design good 3d entityModel for all-round investigation, which greatly improve the general layout design efficiency and quality.Decorate a skeleton, and then simply decorated drive line centerline - that the engine crank the on-off centerlineDevice, the transmission, the drive shaft, and a series of main reducer drive shaft centerline. Here need to check the drive shaft in jumpMove when the limit position transmission Angle, and the whole universal whether smooth driving line. Prerequisite for engineWheel drive, the arrangement type need to check the oil pan to front axle beat clearance.In power transmission systems, began to decorate after position scheduled driver position. From the accelerator pedal, brake and pedalThe clutch pedal position, 4-nry floor, cushion on the height and the driver seat, steering, and sitting dish,Eye position. These positions constitute a series of hard points. When decorating a pilot position when the body of the standard sizeThe driver templates, make design meets most drivers figure while retaining some regulation to adapt to the limitsHigher or shorter pilot.In power system and the driver seat arranged so that to car for example, will make cars outside contour line and the steamBefore, during and after the three tanks, engine compartment dividing line around the engine and its attachments arrangement: cab or byAccording to the occupant seats and its members cabin with engine compartment and wheel limit position of boundaries, the car that is roughly bodies 本文首先綜述了計算機輔助汽車設(shè)計技術(shù)的發(fā)展以及人工智能、知識工程 技術(shù)在汽車整車設(shè)計中的應(yīng)用發(fā)展狀況。在對汽車整車設(shè)計內(nèi)容和特點以及人工智能、知識工程理論、方法和技術(shù)進行分析的基礎(chǔ)上。結(jié)合產(chǎn)品設(shè)計的過程和特點，將汽車整車設(shè)計分成總體參數(shù)設(shè)計、總布置設(shè)計、性能分析計算、設(shè)計綜合評價等相對獨立的四個部分，針對每一部分就其實現(xiàn)方法和關(guān)鍵技術(shù)作了概括性論述，從而構(gòu)成了汽車整車設(shè)計的知識工程方法體系。在對現(xiàn)有車型參數(shù)統(tǒng)計方法進行分析的基礎(chǔ)上，提出了基于模糊綜合評判的車型參數(shù)統(tǒng)計分析方法，由此得到的統(tǒng)計結(jié)果與原統(tǒng)計方法相比統(tǒng)計結(jié)果將更具參考價值。在對汽車整車方案設(shè)計階段總體參數(shù)設(shè)計的特點進行論述的基礎(chǔ)上，結(jié)合現(xiàn)代優(yōu)化設(shè)計方法和基于實例的設(shè)計方法，通過度量設(shè)計方案與已有車型實例之間的相似關(guān)聯(lián)度，進行了基于實例的汽車整車總體參數(shù)的遺傳優(yōu)化設(shè)計方法研究。 在對汽車總布置內(nèi)容和特點進行分析的基礎(chǔ)上，通過建立總布置裝配樹形結(jié)構(gòu)，建立總布置裝配設(shè)計規(guī)則，充分利用三維CAD軟件的參數(shù)化方法和相關(guān)性驅(qū)動技術(shù)，通過UG二次開發(fā)技術(shù)，構(gòu)建了基于規(guī)則和三維CAD技術(shù)的汽車總布置裝配設(shè)計方法，實現(xiàn)了汽車總成在三維環(huán)境下的模塊化裝配和參數(shù)化、相關(guān)性修改。對于模型在汽車整車設(shè)計分析中的應(yīng)用進行了初步研究。根據(jù)對鋼板彈簧在受力變形下基本幾何參數(shù)之間關(guān)系的分析，通過將彎曲方向相反的兩段圓弧組合在一起，結(jié)合UG二次開發(fā)，建立了鋼板彈簧三維參數(shù)化幾何模型，解決了鋼板彈簧彎曲變形中的正反向彎曲問題。最后在分析產(chǎn)品信息集成技術(shù)的基礎(chǔ)上，構(gòu)造了基于知識工程的汽車整車設(shè)計的系統(tǒng)流程，形成汽車整車設(shè)計的知識工程方法體系。總布置設(shè)計所要解決的主要是空間位置和相互關(guān)系，統(tǒng)籌協(xié)調(diào)各部件的相互位置，其中有些部件在布置上要滿足方案設(shè)計中所制定的整車參數(shù)的要求，或者說整車參數(shù)要靠某些部件在布置上的情況來實現(xiàn)。通過總布置設(shè)計工作，設(shè)計者把初步形成的設(shè)計思想以一定的形式(總布置草圖、三維總裝配體等)具體表達出來，這是從思想轉(zhuǎn)變?yōu)榫唧w實物的第一步。汽車設(shè)計是從整車到總成，再從總成到零部件的設(shè)計過程，即先有整體的概念，然后逐步進行具體化。整體由局部組成，而在進行局部設(shè)計時，則要從其在整體中所處位置和所起作用出發(fā)，考慮組成整體的各局部間的相互關(guān)系，明確邊界條件，才能避免各部分出現(xiàn)不協(xié)調(diào)現(xiàn)象?？梢?，總體布置對汽車的設(shè)計質(zhì)量、汽車的性能和產(chǎn)品的生命力起著相當重要的作用。 由于零部件設(shè)計要在整車總布置基本完成后才開始，在總布置設(shè)計階段中往往 沒有零部件的詳細資料，還不能解決零部件和總成內(nèi)部的細節(jié)問題。所以在布置設(shè) 計圖上出現(xiàn)的是各總成的主要控制點、主要中心線，也包括重要的外廓線和由這些 輪廓線構(gòu)成的控制面以及運動極限位置等。這些控制點稱為硬點(Hard point)，重 要的總成外廓表面稱為硬表面(Hard surface)，一般也把這些控制元素統(tǒng)稱為硬點 (Hard point)，包括整車及關(guān)鍵零部件的各種控制點、線、面等。在汽車的總布置 設(shè)計中，硬點位置是首先要確定下來的，通過征求有關(guān)設(shè)計部門的意見，在負責產(chǎn) 品設(shè)計的領(lǐng)導參加下，討論定案。硬點一旦確定，就不再輕易更動，成為進一步設(shè) 計的依據(jù)。 設(shè)計硬點構(gòu)成了汽車總布置設(shè)計的骨架?？梢哉J為，汽車總布置設(shè)計的過程就 是設(shè)計硬點不斷明確、逐步確定的動態(tài)過程。在早些時候，汽車總布置硬點的確定 大都是在圖紙上二維狀態(tài)下通過繪制線框圖來實現(xiàn)的。隨著CAD技術(shù)的發(fā)展，總 布置設(shè)計硬點的確定更傾向于在三維狀態(tài)下進行，并可直接使用設(shè)計好的三維實體 模型進行全方位進行考察，從而大大提高了總布置設(shè)計的效率和質(zhì)量。 有了骨架布置前后輪中心線，然后布置驅(qū)動線——即發(fā)動機曲軸中心線經(jīng)離合 器、變速器、傳動軸至驅(qū)動軸主減速器的一連串中心線。這里需要檢查驅(qū)動軸在跳 動極限位置時傳動軸萬向節(jié)的角度，以及整個驅(qū)動線是否平順。對于發(fā)動機前置后 輪驅(qū)動的布置型式，還需要檢查發(fā)動機油底殼至前軸的跳動間隙。 在動力傳動系統(tǒng)位置排定后，開始布置駕駛員位置。從油門踏板、制動踏板和 離合器踏板的位置出發(fā)，定出地板、坐墊高度及駕駛員的坐姿，以及座椅、轉(zhuǎn)向盤、 眼睛的位置。這些位置構(gòu)成一系列硬點。在布置駕駛員位置時采用標準人體尺寸的 駕駛員模板，使設(shè)計符合大多數(shù)的駕駛員身材，同時保留一定的調(diào)節(jié)限度，以適應(yīng) 較高或較矮的駕駛員。 在動力系統(tǒng)及駕駛員座位安排好后，以轎車為例，就要制作汽車的外廓線及汽車前、中、后三個艙的劃分界限，發(fā)動機艙圍繞發(fā)動機及其附件布置：駕駛室或乘員艙按乘員座位及其與發(fā)動機艙及車輪極限位置的分界線，汽車的形體就大體確定 關(guān)鍵詞：汽車總體設(shè)計知識工程模糊綜合評判 統(tǒng)計分析 遺傳算 法總布置裝配二次開發(fā)模型系統(tǒng) 7