本文關(guān)鍵詞： 橋式起重機(jī) 快速設(shè)計 UGNX7.0二次開發(fā) 專家系統(tǒng)　出處：《濟(jì)南大學(xué)》2012年碩士論文　論文類型：學(xué)位論文

【摘要】：目前，，國內(nèi)橋式起重機(jī)設(shè)計仍然以人工設(shè)計計算為主，以CAD軟件進(jìn)行非參數(shù)化建模為輔，對橋式起重機(jī)設(shè)計自動化的研究大多停留在零部件的參數(shù)化設(shè)計的層面上。本文以智能設(shè)計理論為基礎(chǔ)，構(gòu)建了包含從整機(jī)方案到零部件設(shè)計的橋式起重機(jī)智能快速設(shè)計系統(tǒng)。 在前期大量查閱文獻(xiàn)的基礎(chǔ)上，系統(tǒng)總結(jié)了目前起重機(jī)設(shè)計中普遍存在的問題及其發(fā)展趨勢，詳細(xì)分析了橋式起重機(jī)的基本設(shè)計流程，并確定了本論文的研究目標(biāo)。根據(jù)橋式起重機(jī)設(shè)計智能化的需求及人機(jī)智能設(shè)計的原理設(shè)計了系統(tǒng)的功能構(gòu)成及模塊設(shè)置，確定了系統(tǒng)的關(guān)鍵技術(shù)為知識庫的構(gòu)建及推理機(jī)制的確定，構(gòu)建了系統(tǒng)的實現(xiàn)框架。 研究了橋式起重機(jī)智能快速設(shè)計系統(tǒng)知識庫的構(gòu)建模式。對橋式起重機(jī)設(shè)計過程中所涉及到的知識進(jìn)行了分類，研究并闡述了相關(guān)設(shè)計知識的表示方法、知識的關(guān)聯(lián)分析和知識的獲取方式等知識庫關(guān)鍵技術(shù)，其中系統(tǒng)的知識表示方法采用產(chǎn)生式規(guī)則與框架混合表示方法，知識的獲取則采用人工獲取與自動獲取的混合機(jī)制。根據(jù)橋式起重機(jī)的具體設(shè)計過程，構(gòu)建了系統(tǒng)的知識庫。 研究了橋式起重機(jī)智能快速設(shè)計系統(tǒng)的推理機(jī)制，同時給出了推理過程中所涉及的大量模糊數(shù)值的處理辦法。系統(tǒng)采用基于實例推理和知識推理的混合推理方式，并輔之以參數(shù)化驅(qū)動的設(shè)計方式，提高了設(shè)計效率。詳細(xì)敘述了推理過程，完成了推理機(jī)的設(shè)計。模糊數(shù)值的處理方法包括針對區(qū)間數(shù)值采用的區(qū)間函數(shù)處理辦法，針對單向數(shù)值采用的最近鄰法和針對不確定性經(jīng)驗數(shù)值的可信度排序法。 系統(tǒng)選用VC++2005開發(fā)人機(jī)交互界面和相關(guān)程序，圖形支撐平臺選用UGNX7.0，采用Microsoft OfficeAccess2003完成數(shù)據(jù)庫設(shè)計，采用SQL語言開發(fā)了數(shù)據(jù)管理模塊，實現(xiàn)對數(shù)據(jù)庫表操作。利用面向?qū)ο蟮某绦蛟O(shè)計方法和系統(tǒng)集成的思想，實現(xiàn)橋式起重機(jī)智能快速設(shè)計系統(tǒng)的具體開發(fā)。最后，以20/5T雙梁橋式起重機(jī)的設(shè)計為例驗證了系統(tǒng)的有效性。
[Abstract]:At present, the design of bridge crane in China is still based on manual design and calculation, and the non-parametric modeling is aided by CAD software. The research of bridge crane design automation mostly stays on the level of parametric design of parts. This paper is based on intelligent design theory. An intelligent and rapid design system of bridge crane is constructed, which includes the whole machine scheme and component design. On the basis of a large number of previous literature, the paper summarizes the common problems and development trend of crane design, and analyzes the basic design process of bridge crane in detail. According to the demand of intelligent design of bridge crane and the principle of human-computer intelligent design, the function composition and module setting of the system are designed. The key technologies of the system are the construction of the knowledge base and the determination of the reasoning mechanism, and the implementation framework of the system is constructed. This paper studies the construction mode of knowledge base of intelligent and rapid design system for bridge crane, classifies the knowledge involved in the design process of bridge crane, studies and expounds the representation method of related design knowledge. The key technologies of knowledge base, such as knowledge association analysis and knowledge acquisition, are presented in this paper. The knowledge representation in the system adopts the hybrid representation method of production rules and framework. The knowledge acquisition is based on the hybrid mechanism of manual acquisition and automatic acquisition, and the knowledge base of the system is constructed according to the design process of the bridge crane. The reasoning mechanism of intelligent rapid design system for bridge crane is studied. At the same time, the method of dealing with a large number of fuzzy values involved in the process of reasoning is given. The system adopts a mixed reasoning method based on case-based reasoning and knowledge reasoning, supplemented by a parameterized design method. The design efficiency is improved, the reasoning process is described in detail, and the design of inference engine is completed. The processing method of fuzzy value includes interval function processing method for interval value. The nearest neighbor method for unidirectional values and the credibility ranking method for uncertain empirical values are used. The system uses VC 2005 to develop man-machine interface and related programs, graphics support platform using UGNX7.0. The database is designed by Microsoft OfficeAccess2003, and the data management module is developed by SQL language. The realization of database table operation, using the object-oriented programming method and the idea of system integration, the realization of bridge crane intelligent rapid design system specific development. Finally. The design of 20 / 5 T double girder bridge crane is taken as an example to verify the effectiveness of the system.
【學(xué)位授予單位】：濟(jì)南大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2012
【分類號】：TH215;TP311.52

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