【摘要】：變型設(shè)計(jì)可以提高具有相似結(jié)構(gòu)的系列產(chǎn)品的設(shè)計(jì)質(zhì)量和設(shè)計(jì)效率,縮短產(chǎn)品的研發(fā)周期,使產(chǎn)品能夠快速響應(yīng)市場(chǎng)需求。本文對(duì)變型設(shè)計(jì)過(guò)程中的零件變型策略、仿真驗(yàn)證方法以及專家知識(shí)在機(jī)械設(shè)計(jì)中的應(yīng)用方法等關(guān)鍵技術(shù)進(jìn)行了較為深入系統(tǒng)的研究。以一款通用型運(yùn)動(dòng)模擬器為例,開(kāi)發(fā)了智能變型設(shè)計(jì)平臺(tái)�；诔叽缱兓怕誓Ｐ吞岢隽四Ｐ偷淖冃筒呗�,通過(guò)對(duì)零件尺寸參數(shù)類型和傳遞方式的梳理,建立了尺寸約束關(guān)系網(wǎng)絡(luò);利用尺寸約束關(guān)系網(wǎng)絡(luò)和尺寸傳遞延時(shí)策略,提出了尺寸傳遞沖突處理方法;基于貝葉斯公式,構(gòu)建了零件的尺寸變化概率模型,確定了零件的變型策略。利用ANSYS二次開(kāi)發(fā)技術(shù)與機(jī)器學(xué)習(xí)方法對(duì)智能仿真驗(yàn)證技術(shù)進(jìn)行了研究。結(jié)合運(yùn)動(dòng)模擬器的運(yùn)動(dòng)特點(diǎn),對(duì)其關(guān)鍵部位進(jìn)行了靜力學(xué)和模態(tài)分析;利用MFC(Microsoft Foundation Classes)開(kāi)發(fā)了運(yùn)動(dòng)模擬器的自動(dòng)仿真平臺(tái),結(jié)合APDL(ANSYS Parametric Design Language)命令,實(shí)現(xiàn)了基于ANSYS的自動(dòng)仿真功能;利用BP神經(jīng)網(wǎng)絡(luò)模型,提出了基于參數(shù)的計(jì)算機(jī)驗(yàn)證方法,以運(yùn)動(dòng)模擬器的設(shè)計(jì)驗(yàn)證為例對(duì)該方法進(jìn)行了驗(yàn)證�；贘avaScript與C++對(duì)機(jī)械設(shè)計(jì)知識(shí)在變型設(shè)計(jì)中的輔助方法進(jìn)行了研究。分析了設(shè)計(jì)知識(shí)的特點(diǎn),將設(shè)計(jì)知識(shí)分為三類,針對(duì)每一類知識(shí)的特點(diǎn),提出了相應(yīng)的在數(shù)據(jù)結(jié)構(gòu)中的表示與保存方法;基于Pro/E的設(shè)計(jì)環(huán)境,結(jié)合相應(yīng)的設(shè)計(jì)知識(shí),開(kāi)發(fā)了智能變型設(shè)計(jì)平臺(tái);利用JavaScript構(gòu)建了知識(shí)腳本文件,通過(guò)腳本程序與智能設(shè)計(jì)主程序的配合,實(shí)現(xiàn)了設(shè)計(jì)知識(shí)在設(shè)計(jì)過(guò)程中的動(dòng)態(tài)輔助。結(jié)合市場(chǎng)需求,設(shè)計(jì)了一款通用型運(yùn)動(dòng)模擬器樣機(jī),開(kāi)發(fā)了面向運(yùn)動(dòng)模擬器的智能變型設(shè)計(jì)平臺(tái),該設(shè)計(jì)平臺(tái)融合了變型設(shè)計(jì)模塊、專家知識(shí)模塊、設(shè)計(jì)驗(yàn)證模塊,實(shí)現(xiàn)了運(yùn)動(dòng)模擬器的智能變型設(shè)計(jì)。本論文通過(guò)對(duì)變型策略、變型設(shè)計(jì)驗(yàn)證、變型設(shè)計(jì)中的知識(shí)輔助等關(guān)鍵技術(shù)的研究,為機(jī)械產(chǎn)品的智能變型設(shè)計(jì)提供了一套完整的、有效的解決方案。
[Abstract]:Variant design can improve the design quality and design efficiency of series products with similar structure, shorten the research and development cycle of products, and enable the products to respond to market demand quickly. In this paper, the key technologies of variant design, such as part modification strategy, simulation and verification method, and the application of expert knowledge in mechanical design, are studied in detail and systematically. Taking a general motion simulator as an example, an intelligent variant design platform is developed. Based on the probability model of dimension change, the variant strategy of the model is put forward, and the dimension constraint relation network is established by combing the dimension parameter type and the transfer mode of the part, and the dimension constraint relation network and the dimension transfer delay strategy are used. Based on Bayesian formula, the probability model of dimension change of parts is constructed, and the modification strategy of parts is determined. The intelligent simulation verification technology is studied by using ANSYS secondary development technology and machine learning method. Combined with the motion characteristics of the motion simulator, the static and modal analysis of the key parts of the motion simulator is carried out, the automatic simulation platform of the motion simulator is developed by using MFC (Microsoft Foundation Classes), and the automatic simulation function based on ANSYS is realized with the APDL (ANSYS Parametric Design Language) command. Based on the BP neural network model, a parameter-based computer verification method is proposed. The design verification of motion simulator is taken as an example to verify the method. Based on JavaScript and C, the auxiliary method of mechanical design knowledge in variant design is studied. The characteristics of design knowledge are analyzed and the design knowledge is divided into three categories. According to the characteristics of each kind of knowledge, the corresponding representation and preservation methods in data structure are put forward, and the design environment based on Pro/E is combined with the corresponding design knowledge. The intelligent variant design platform is developed, and the knowledge script file is constructed by using JavaScript. Through the cooperation of the script program and the intelligent design main program, the dynamic assistance of the design knowledge in the design process is realized. According to the market demand, a general motion simulator prototype is designed, and an intelligent variant design platform for motion simulator is developed. The design platform combines variant design module, expert knowledge module and design verification module. The intelligent variant design of motion simulator is realized. Through the research on the key technologies of variant strategy, variant design verification and knowledge assistant in variant design, this paper provides a complete and effective solution for intelligent variant design of mechanical products.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TB472

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