【摘要】：圍繞動力學(xué)建模、動力學(xué)仿真、運動規(guī)律等關(guān)鍵技術(shù)問題對平行分度凸輪機(jī)構(gòu)的動力學(xué)展開研究。為設(shè)計動態(tài)性能卓越的平行分度凸輪機(jī)構(gòu)提供了理論依據(jù)。 對平行分度凸輪機(jī)構(gòu)進(jìn)行了運動學(xué)分析,得出結(jié)論:變余弦傳動函數(shù)和蓋特曼傳動函數(shù)對應(yīng)的輸出角位移和角速度的變化規(guī)律相似,角加速度的變化規(guī)律存在本質(zhì)區(qū)別。變余弦傳動函數(shù)對應(yīng)的輸出運動角加速度在分度開始和分度結(jié)束時存在突變;蓋特曼傳動函數(shù)對應(yīng)的輸出運動角加速度是連續(xù)的。 對分度凸輪機(jī)構(gòu)的傳動函數(shù)進(jìn)行了研究,提出了“自下而上”的傳動函數(shù)構(gòu)造思想,并給出了函數(shù)構(gòu)造實例,以加速度連續(xù)、躍度連續(xù)為目標(biāo)構(gòu)造了傳動函數(shù)。 在分析平行分度凸輪機(jī)構(gòu)特點的基礎(chǔ)上,提出了基于多體系統(tǒng)動力學(xué)的動力學(xué)建模方法。利用ADAMS、Pro/E、ANSYS三種平臺聯(lián)合建立了平行分度凸輪機(jī)構(gòu)的剛?cè)狁詈系膭恿W(xué)模型。 以動力學(xué)建模為基礎(chǔ)進(jìn)行了仿真分析,通過模型測試驗證了動力學(xué)建模的正確性,提出了基于虛擬樣機(jī)技術(shù)的傳動函數(shù)驗證方法。分析了影響機(jī)構(gòu)動力學(xué)性能的主要因素,以加速度響應(yīng)、扭轉(zhuǎn)振動為分析目標(biāo),研究了輸入轉(zhuǎn)速、負(fù)載慣量、動程角等參數(shù)對平行分度凸輪機(jī)構(gòu)動力學(xué)性能的影響規(guī)律。 針對不同傳動函數(shù)對應(yīng)的凸輪機(jī)構(gòu)進(jìn)行了動力學(xué)仿真和分析,提出了基于機(jī)構(gòu)動態(tài)性能的傳動函數(shù)選用原則:變余弦傳動函數(shù)只適合于低速和對傳動精度要求不高的場合;蓋特曼傳動函數(shù)適用范圍比Y 余弦傳動函數(shù)廣，，可用于從低速到較高速度以及傳動精度要求較高的場合;復(fù)合傳動函數(shù)是高速時動力學(xué)特性最好的傳動函數(shù),適用于高速分度凸輪機(jī)構(gòu)。
[Abstract]:The dynamics of parallel indexing cam mechanism is studied around the key technical problems such as dynamics modeling, dynamics simulation and motion law. It provides a theoretical basis for the design of parallel indexing cam mechanism with excellent dynamic performance. The kinematics analysis of parallel indexing cam mechanism is carried out. It is concluded that the variation law of output angular displacement and angular velocity corresponding to variable cosine transmission function and Gettmann transmission function is similar, and the variation law of angular acceleration is essentially different. The angular acceleration of the output motion corresponding to the variable cosine transmission function is abrupt at the beginning of the indexing and the end of the indexing, and the angular acceleration of the output motion corresponding to the Gettmann transmission function is continuous. In this paper, the transmission function of indexing cam mechanism is studied, the idea of constructing transmission function from bottom to top is put forward, and an example of function construction is given. The transmission function is constructed with the aim of continuous acceleration and continuous jump. On the basis of analyzing the characteristics of parallel indexing cam mechanism, a dynamic modeling method based on multi-body system dynamics is proposed. The dynamic model of rigid-flexible coupling of parallel indexing cam mechanism is established by using three platforms of ADAMS,Pro/E,ANSYS. Based on the dynamic modeling, the simulation analysis is carried out, and the correctness of the dynamic modeling is verified by the model test. A driving function verification method based on virtual prototyping technology is proposed. The main factors that affect the dynamic performance of the mechanism are analyzed. With the acceleration response and torsional vibration as the analysis targets, the influence of the parameters such as the input speed, the inertia of the load and the angle of motion on the dynamic performance of the parallel indexing cam mechanism is studied. The dynamic simulation and analysis of cam mechanism corresponding to different transmission functions are carried out, and the principle of selecting transmission function based on the mechanism's dynamic performance is put forward: the variable cosine transmission function is only suitable for low speed and low transmission precision; The application range of Gatman transmission function is wider than that of Y cosine transmission function, and it can be used in the situation from low speed to higher speed and high transmission precision. Compound transmission function is the best dynamic function in high speed, and it is suitable for high speed indexing cam mechanism.
【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】：2011
【分類號】：TH112.2

【引證文獻(xiàn)】

相關(guān)碩士學(xué)位論文 前1條

1 曹艷科;基于凸輪驅(qū)動的高壓柱塞水泵研究[D];濟(jì)南大學(xué);2012年

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