【正文】 設(shè)計(jì)規(guī)則類型包括： .計(jì)算 .條件句 .查 尋 數(shù)據(jù)庫(kù) .固定 .變量 .引用 .執(zhí)行外部程序 .選擇 .優(yōu)化。 元模型技術(shù)用于開發(fā)復(fù)雜系統(tǒng)的模型。 采取輸入規(guī)范說明，運(yùn)用相關(guān)的做法并且自動(dòng)地引起設(shè)計(jì)。工程師添加他們的判斷力，優(yōu)化設(shè)計(jì)，最終系統(tǒng)。這些軟件工具用于開發(fā)domainspecific 這兩個(gè)知識(shí)工程的方法設(shè)計(jì)工具，設(shè)計(jì)顧問和虛擬樣機(jī)。 KBE 實(shí)現(xiàn)了真正的并行工程攻克了一系列的捐助領(lǐng)域的專門知識(shí)在一個(gè)組織。 相對(duì)于傳統(tǒng)的設(shè)計(jì)工具， KBE 提供真正的設(shè)計(jì)與 自動(dòng)化 設(shè)計(jì)協(xié)助。 第三類涉及到建立一個(gè) 以 該模型中的規(guī)則為基礎(chǔ)的系統(tǒng)模型。 . 生成技術(shù) 4 有三種 KBE 的工具，目前正在探索和發(fā)展類型。 在 KBE， 產(chǎn)品結(jié)構(gòu)樹 (拓?fù)鋵W(xué) )是動(dòng)態(tài)的，因此知識(shí)經(jīng)濟(jì)提供真正 的工程自動(dòng)化，包括應(yīng)用開發(fā)，幾何造型，應(yīng)用程序部署和工具的集成。經(jīng)驗(yàn) 法則和共同的實(shí)踐是評(píng)斷知識(shí)的實(shí)例。一個(gè)真正的虛擬原型包含此 全方 位設(shè)計(jì)知識(shí) 。問題就是 架構(gòu)一個(gè)設(shè)計(jì)工具，以滿足所有這些要求。 工程權(quán)衡過程中 采用良好的估計(jì)和非正式的啟發(fā) 進(jìn)行概念設(shè)計(jì) 。高級(jí)別的工程設(shè)計(jì)和分析過程 (概念設(shè)計(jì)階段 )特別重要，因?yàn)榇蠖鄶?shù)的生命周期成本和整體系統(tǒng) 的質(zhì)量 都 在這個(gè)階段。 所有 這些因素都主張采取綜合設(shè)計(jì)工具和環(huán)境， 以在早期的綜合設(shè)計(jì)階段提供幫助 。 產(chǎn)品表示法 已經(jīng)從二維的形狀和幾何的形式字形繪畫的 表示法移動(dòng)向 充分的三維幾何模型 表示法。事實(shí)被 APK 通過工程和分析算法改變 。 . 基于知識(shí)的工程 (KBE) 該技術(shù)允許一個(gè)真正的產(chǎn)品虛擬樣機(jī)開發(fā)被稱為基于知識(shí)的工程，或 KBE。虛擬原型，如材料的所有幾何特征或?qū)傩缘漠a(chǎn)品，以及非幾何屬性，質(zhì)量特性，應(yīng)力和撓度特性 等虛擬樣機(jī)一旦被創(chuàng)建，它可以由設(shè)計(jì)者使用評(píng)估成功或設(shè)計(jì)配置的優(yōu)點(diǎn)，然后修改。 第二類，設(shè)計(jì)顧問，更是目前的事態(tài)發(fā)展之一。一個(gè)生成模型的優(yōu)點(diǎn)是，由于產(chǎn)品需求的變化，外觀設(shè)計(jì)的表述是立即更新，直接影響到所 有輸出。對(duì)象不是被動(dòng) 的，但可以反應(yīng)其他對(duì)象。 當(dāng)中包括 ICADTM， TKSolverTM，設(shè)計(jì) LinkTM， ProEngineerTM， STONEruleTM 和智能 ElementsTM。 該報(bào)告可以包括例如：分析， 3 個(gè)數(shù)據(jù)的三維幾何模型，材料，成本報(bào)告和指示 草案 。生成虛擬樣機(jī)的代表背后的幾何設(shè)計(jì)工程意圖。通常是基于企業(yè)文化設(shè)計(jì)的啟發(fā)。 設(shè)計(jì)規(guī)則用于合成中的知識(shí)基礎(chǔ)知識(shí)，如何在給定的模型建立知識(shí)。 process on a first development project and then will transfer and apply those skills to followon projects. KBE tools There are a variety of software tools available for KBE tool development. Included are ICADTM, TKSolverTM, Design LinkTM, ProEngineerTM,STONEruleTM and Smart ElementsTM. All of these are integrated with at least one of the contemporary CAD systems to provide a contemporary integrated design system. Unigraphics,CATIATM, ProEngineerTM, IDEASTM and AutoCADTM are some of the options. These software tools are used to develop domainspecific design tools of the two KBE approaches,design advisor and the virtual prototype. Generative virtual prototype (GVP) The virtual prototype approach forms the basis of the KBE classes described, and is based on the use of the KBE software ICAD [5]. ICAD is used for metadesign, which is the design of design tools in the form of a product model. The product model is the framework for the product structure, engineering analysis, product cost, design standards,regulatory codes, material characteristics, manufacturing constrains and process plans. It is able to output a design report that represents the design state of the product. This report can include for example： data for analysis, 3D geometric models,bills of material, cost reports and manufacturing instructions. The GVP captures and automates the functional design rules and understood methodologies of the engineering process. The GVP provides functionally valid alternatives for engineers to select and manipulate. The 12 engineers add their judgement to optimize final systems designs. A generative virtual prototype (GVP) is a system model that represents both the geometric and nonD. Calkins, et geometric attributes of a product (an object) which are embedded in the KBE model. It stores knowledge about a system in a product model posed of design and manufacturing engineering rules,which address both geometric and nongeometric issues. A generative virtual prototype is a bination of these design rules and includes a set of engineering instructions used to create the design,that is, the vehicle geometry. The generative virtual prototype represents the engineering intent behind the geometric design. It can store product information such as geometry and material specifications as well as process and performance information. The generative virtual prototype paradigm is defined as follows： Generative： generate or automatically produce an instance of the virtual prototype in response to an input state vector. Take input specifications, apply relevant procedures and gene