本文選題：知識(shí)建模 + 知識(shí)重用　； 參考：《浙江大學(xué)》2011年碩士論文

【摘要】：在當(dāng)前以顧客為導(dǎo)向的市場(chǎng)環(huán)境下,多元化和個(gè)性化的客戶需求使得產(chǎn)品復(fù)雜性增加、設(shè)計(jì)周期縮短、產(chǎn)品更新加快,這給企業(yè)產(chǎn)品設(shè)計(jì)提出了很大的挑戰(zhàn)。如何對(duì)眾多產(chǎn)品知識(shí)進(jìn)行高效地管理與利用,以提高產(chǎn)品設(shè)計(jì)的效率與質(zhì)量,是企業(yè)保證其競(jìng)爭(zhēng)力的關(guān)鍵。針對(duì)國(guó)內(nèi)機(jī)械類企業(yè)尤其是中小企業(yè)中存在的設(shè)計(jì)知識(shí)管理混亂、產(chǎn)品開(kāi)發(fā)周期長(zhǎng)、知識(shí)重用率低等問(wèn)題,本文將進(jìn)行以下研究： 1.在歸納現(xiàn)有機(jī)械類產(chǎn)品設(shè)計(jì)知識(shí)的基礎(chǔ)上,提出了基于本體的知識(shí)表達(dá),通過(guò)特征類概念、過(guò)程類概念、原理類概念以及實(shí)例類概念組成的四元本體對(duì)機(jī)械類產(chǎn)品知識(shí)進(jìn)行表示,并給出了知識(shí)表示模型的搭建流程,從而使得機(jī)械類產(chǎn)品知識(shí)具有一個(gè)規(guī)范性的描述。 2.針對(duì)機(jī)械類產(chǎn)品的結(jié)構(gòu)特點(diǎn),本文提出了組合特征的實(shí)例搜索策略,并采用最近相鄰算法與知識(shí)引導(dǎo)法相結(jié)合的方式進(jìn)行實(shí)例相似度計(jì)算,通過(guò)基于K-均值的權(quán)值算法對(duì)特征相似度權(quán)值進(jìn)行智能學(xué)習(xí),實(shí)現(xiàn)產(chǎn)品相似實(shí)例快速準(zhǔn)確的檢索。 3.利用Petri網(wǎng)對(duì)產(chǎn)品設(shè)計(jì)過(guò)程進(jìn)行建模,針對(duì)傳統(tǒng)Petri網(wǎng)存在的缺點(diǎn)提出了兩點(diǎn)改進(jìn),一是提出了Petri塊的概念,用以縮小Petri網(wǎng)的規(guī)模,使得Petri網(wǎng)模型具有多層建模功能；二是對(duì)變遷加以謂詞模塊,以提升變遷的邏輯處理能力。在上述兩處改進(jìn)的基礎(chǔ)上,提出了相應(yīng)的機(jī)械類產(chǎn)品設(shè)計(jì)過(guò)程的Petri網(wǎng)建模方法。 4.文章最后,基于原有的PDM系統(tǒng),以Visual Studio作為開(kāi)發(fā)環(huán)境,SQL Server作為數(shù)據(jù)庫(kù)系統(tǒng),并用文中提出的知識(shí)建模方式開(kāi)發(fā)摩托車制動(dòng)器設(shè)計(jì)系統(tǒng)。
[Abstract]:In the current customer-oriented market environment, diversification and individuation of customer demand increase the complexity of products, shorten the design cycle, and accelerate product renewal, which brings a great challenge to enterprise product design. How to efficiently manage and utilize the knowledge of many products in order to improve the efficiency and quality of product design is the key for enterprises to ensure their competitiveness. In order to solve the problems of confused design knowledge management, long product development cycle and low knowledge reuse rate in domestic mechanical enterprises, especially in small and medium-sized enterprises, this paper will carry out the following research: 1. On the basis of summarizing the existing knowledge of mechanical product design, this paper puts forward the knowledge representation based on ontology, which is based on the concept of feature class, the concept of process class, the concept of feature class and the concept of process class. The concept of principle class and the concept of example class are composed of quaternion ontology to express the knowledge of mechanical product, and the process of building knowledge representation model is given, which makes the knowledge of mechanical product have a normative description. 2. According to the structural characteristics of mechanical products, this paper proposes a case search strategy based on combinatorial features, and uses the nearest neighbor algorithm and knowledge guidance method to calculate the similarity of cases. Based on the K- mean weight algorithm, the feature similarity weights are intelligently learned, and the product similarity examples can be retrieved quickly and accurately. 3. Petri net is used to model the product design process. Two improvements are put forward in view of the disadvantages of traditional Petri net. Firstly, the concept of Petri block is put forward to reduce the scale of Petri net and make the Petri net model have multi-layer modeling function. Second, predicate module is used to improve the logic processing ability of transition. Based on the above two improvements, a corresponding Petri net modeling method for mechanical product design process is proposed. 4. Finally, based on the original PDM system, using Visual Studio as the development environment, SQL Server is used as the database system, and the motorcycle brake design system is developed with the knowledge modeling method proposed in this paper.
【學(xué)位授予單位】：浙江大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2011
【分類號(hào)】：TH122

【引證文獻(xiàn)】

相關(guān)期刊論文 前1條

1 陳君;;基于實(shí)例的汽車零部件產(chǎn)品開(kāi)發(fā)中關(guān)鍵技術(shù)研究[J];湖北理工學(xué)院學(xué)報(bào);2013年01期

相關(guān)碩士學(xué)位論文 前2條

1 張冬明;產(chǎn)品設(shè)計(jì)知識(shí)管理機(jī)制研究[D];天津大學(xué);2012年

2 李榮鵬;液壓挖掘機(jī)設(shè)計(jì)專家系統(tǒng)研究[D];浙江大學(xué);2012年

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本文編號(hào)：1914730