發(fā)布時(shí)間：2018-10-26 16:46

【摘要】：知識(shí)工程在機(jī)械產(chǎn)品尤其是真空設(shè)備的設(shè)計(jì)領(lǐng)域的研究和應(yīng)用還處于初級(jí)階段,特別是在國內(nèi),很多真空設(shè)備制造企業(yè)至今尚未認(rèn)識(shí)到其重要性,現(xiàn)有的理論研究還與實(shí)踐含具有較大的差距,處于初步嘗試階段。同時(shí)隨著市場競爭不斷激烈,客戶需求響應(yīng)的及時(shí)性的提高,對(duì)真空設(shè)備制造企業(yè)提出了越來越高的要求。因此,企業(yè)要想保持核心競爭力,必須實(shí)施知識(shí)工程方法,將知識(shí)工程應(yīng)用到真空機(jī)組產(chǎn)品的方案設(shè)計(jì)過程中,因此成為本課題的研究問題。本文主要研究支持真空機(jī)組方案設(shè)計(jì)的設(shè)計(jì)方法和流程,并在研究工作的基礎(chǔ)上開發(fā)面向行業(yè)典型產(chǎn)品的支持真空機(jī)組設(shè)計(jì)的專家系統(tǒng)。本文在研究過程中,始終堅(jiān)持理論聯(lián)系實(shí)際的原則,以理論研究為主線,以真空機(jī)組設(shè)計(jì)方法為主要研究對(duì)象,探討支持真空機(jī)組設(shè)計(jì)的專家系統(tǒng)的原理與應(yīng)用。本課題研究與設(shè)計(jì)的真空機(jī)組智能設(shè)計(jì)系統(tǒng),采用RBR和CBR的雙重推理機(jī)制。一方面從機(jī)組設(shè)計(jì)流程出發(fā),結(jié)合真空知識(shí)與行業(yè)標(biāo)準(zhǔn),吸收技術(shù)人員的設(shè)計(jì)經(jīng)驗(yàn)來建立企業(yè)規(guī)則庫,從而正向推理出真空系統(tǒng)的主要部分—真空泵。另一方面逐步添加企業(yè)所有的訂單來擴(kuò)充實(shí)例庫,力求每一個(gè)新的訂單都能由若干工況參數(shù)和設(shè)計(jì)參數(shù)在實(shí)例庫中尋找到類似的解,仿照類似的案例為新的訂單填充各式各樣的配件,達(dá)到快速?zèng)Q策的目的。同時(shí)CBR推理機(jī)制的一個(gè)卓越的優(yōu)點(diǎn)是邊設(shè)計(jì)邊學(xué)習(xí),經(jīng)由本系統(tǒng)設(shè)計(jì)出的每一條新的訂單,都會(huì)被收錄進(jìn)實(shí)例庫中作為經(jīng)驗(yàn)供后來者使用。根據(jù)不同客戶需求的差異,滿足條件的真空機(jī)組也不一致,系統(tǒng)在提供選型功能的同時(shí)也具有二次開發(fā)的功能。實(shí)例庫中的每一條信息在數(shù)據(jù)庫中都具有唯一的地址與之對(duì)應(yīng),其中包含了訂單的詳細(xì)配置信息、外形預(yù)覽圖、機(jī)組流程圖、CAD裝配圖以及三維模型等,方便技術(shù)人員準(zhǔn)確及時(shí)地找到需要完善的內(nèi)容進(jìn)行二次開發(fā)。本系統(tǒng)同時(shí)也是對(duì)企業(yè)資源的一次整合。由于建立規(guī)則庫與實(shí)例庫的需要,對(duì)一套真空機(jī)組中的各項(xiàng)組成部分必然也需要進(jìn)行詳細(xì)的歸納整理以便甄選出最為適合的組件。本系統(tǒng)滿足了企業(yè)發(fā)展中關(guān)于訂單自動(dòng)化和生產(chǎn)的要求,達(dá)到了預(yù)期的效果,具有一定的經(jīng)濟(jì)價(jià)值和實(shí)用價(jià)值。
[Abstract]:The research and application of knowledge engineering in the field of design of mechanical products, especially vacuum equipment, is still in the initial stage, especially in China, many vacuum equipment manufacturing enterprises have not realized its importance. The existing theoretical research has a big gap with the practice, and it is at the initial stage. At the same time, with the fierce market competition and the improvement of the timeliness of customer demand response, the vacuum equipment manufacturing enterprises put forward higher and higher requirements. Therefore, if enterprises want to maintain their core competitiveness, they must implement knowledge engineering methods and apply knowledge engineering to the design process of vacuum unit products, so it becomes the research problem of this subject. This paper mainly studies the design method and flow chart of supporting vacuum unit scheme design, and develops an expert system for supporting vacuum unit design based on the research work. In this paper, the principle of integrating theory with practice has always been adhered to, and the principle and application of the expert system supporting the design of vacuum unit have been discussed by taking the theoretical research as the main line and the design method of vacuum unit as the main research object. The research and design of the intelligent design system of vacuum unit adopts the dual reasoning mechanism of RBR and CBR. On the one hand, starting from the design process of the unit, combining the vacuum knowledge and industry standard, and absorbing the design experience of the technicians to establish the enterprise rule base, the vacuum pump, the main part of the vacuum system, can be deduced forward. On the other hand, we gradually add all the orders to expand the case library, and strive to find a similar solution in the instance library by several operating and design parameters for each new order. Follow similar cases to fill new orders with various accessories for quick decision-making. At the same time, one of the outstanding advantages of CBR reasoning mechanism is learning by design. Every new order designed by this system will be included in the case library as experience for later users. According to the different requirements of different customers, the vacuum units that meet the requirements are also inconsistent. The system has the function of secondary development while providing the selection function. Each piece of information in the instance library has a unique address corresponding to it in the database, which contains the detailed configuration information of the order, the outline preview diagram, the unit flow chart, the CAD assembly diagram and the 3D model, etc. Facilitate technical personnel to accurately and timely find the need to improve the content for secondary development. This system is also an integration of enterprise resources. Due to the need of establishing rule base and case base, the components of a vacuum unit must also be summed up and sorted in detail in order to select the most suitable components. The system meets the requirements of order automation and production in the development of enterprises, and achieves the expected results. It has certain economic and practical value.
【學(xué)位授予單位】：揚(yáng)州大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TB75

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