【摘要】：圍繞動(dòng)力學(xué)建模、動(dòng)力學(xué)仿真、運(yùn)動(dòng)規(guī)律等關(guān)鍵技術(shù)問(wèn)題對(duì)平行分度凸輪機(jī)構(gòu)的動(dòng)力學(xué)展開(kāi)研究。為設(shè)計(jì)動(dòng)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(duì)平行分度凸輪機(jī)構(gòu)進(jìn)行了運(yùn)動(dòng)學(xué)分析,得出結(jié)論:變余弦傳動(dòng)函數(shù)和蓋特曼傳動(dòng)函數(shù)對(duì)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(dòng)函數(shù)對(duì)應(yīng)的輸出運(yùn)動(dòng)角加速度在分度開(kāi)始和分度結(jié)束時(shí)存在突變;蓋特曼傳動(dòng)函數(shù)對(duì)應(yīng)的輸出運(yùn)動(dòng)角加速度是連續(xù)的。 對(duì)分度凸輪機(jī)構(gòu)的傳動(dòng)函數(shù)進(jìn)行了研究,提出了“自下而上”的傳動(dòng)函數(shù)構(gòu)造思想,并給出了函數(shù)構(gòu)造實(shí)例,以加速度連續(xù)、躍度連續(xù)為目標(biāo)構(gòu)造了傳動(dòng)函數(shù)。 在分析平行分度凸輪機(jī)構(gòu)特點(diǎn)的基礎(chǔ)上,提出了基于多體系統(tǒng)動(dòng)力學(xué)的動(dòng)力學(xué)建模方法。利用ADAMS、Pro/E、ANSYS三種平臺(tái)聯(lián)合建立了平行分度凸輪機(jī)構(gòu)的剛?cè)狁詈系膭?dòng)力學(xué)模型。 以動(dòng)力學(xué)建模為基礎(chǔ)進(jìn)行了仿真分析,通過(guò)模型測(cè)試驗(yàn)證了動(dòng)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(dòng)函數(shù)驗(yàn)證方法。分析了影響機(jī)構(gòu)動(dòng)力學(xué)性能的主要因素,以加速度響應(yīng)、扭轉(zhuǎn)振動(dòng)為分析目標(biāo),研究了輸入轉(zhuǎn)速、負(fù)載慣量、動(dòng)程角等參數(shù)對(duì)平行分度凸輪機(jī)構(gòu)動(dòng)力學(xué)性能的影響規(guī)律。 針對(duì)不同傳動(dòng)函數(shù)對(duì)應(yīng)的凸輪機(jī)構(gòu)進(jìn)行了動(dòng)力學(xué)仿真和分析,提出了基于機(jī)構(gòu)動(dòng)態(tài)性能的傳動(dòng)函數(shù)選用原則:變余弦傳動(dòng)函數(shù)只適合于低速和對(duì)傳動(dòng)精度要求不高的場(chǎng)合;蓋特曼傳動(dòng)函數(shù)適用范圍比Y 余弦傳動(dòng)函數(shù)廣，，可用于從低速到較高速度以及傳動(dòng)精度要求較高的場(chǎng)合;復(fù)合傳動(dòng)函數(shù)是高速時(shí)動(dòng)力學(xué)特性最好的傳動(dòng)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(jí)別】：碩士
【學(xué)位授予年份】：2011
【分類號(hào)】：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(dòng)的高壓柱塞水泵研究[D];濟(jì)南大學(xué);2012年

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