本文選題：形狀可變機構(gòu) + 剛體導(dǎo)引　； 參考：《北京郵電大學(xué)》2011年碩士論文

【摘要】：平面形狀可變機構(gòu)具有一定的自適應(yīng)功能,能通過運動改變自身外形來增強執(zhí)行能力和擴展運用范圍,符合當(dāng)今機械系統(tǒng)向高精度,多用途發(fā)展的趨勢。形狀可變機構(gòu)由數(shù)個剛性片段、剛性桿件和旋轉(zhuǎn)鉸鏈組成,可以通過桿件導(dǎo)引各剛性片運動來逼近數(shù)條曲線,這些曲線定義了機構(gòu)形變的過程。 本文首先針對基于需求提出的形變曲線給予分析,給出處理曲線的兩種算法�！靶巫兦�”被稱為“設(shè)計輪廓”,實質(zhì)是要設(shè)計的平面形狀可變機構(gòu)必須通過的預(yù)定軌跡。設(shè)計輪廓多為樣條曲線,不利于機械設(shè)計,把設(shè)計輪廓近似劃分各個線性線段連成的輪廓,被稱作“目標輪廓”。目標輪廓依然是一條完整曲線,由它直接作為一個構(gòu)件顯然不能滿足設(shè)計精度要求,必須分為多個分段。對數(shù)條目標輪廓的分段求取平均就得出“平均輪廓”,平均輪廓將作為構(gòu)件進入機構(gòu)綜合階段。 其次,形狀可變機構(gòu)的構(gòu)件形狀與曲線有直接關(guān)系,在處理完形變曲線后,給出了一種綜合多桿串聯(lián)機構(gòu)的方法,包括剛體連接和添加轉(zhuǎn)動副。 最后,本文根據(jù)所述設(shè)計原理,具體設(shè)計了形狀可變機構(gòu)的實例來驗證設(shè)計原理的正確性,并在三維軟件中對設(shè)計的形狀可變機構(gòu)進行建模和運動仿真,還對機構(gòu)運動中的傳動角進行適當(dāng)?shù)男阅芊治觥?br/>[Abstract]:The planar variable mechanism has a certain adaptive function, which can enhance the execution ability and expand the application range by changing its shape, which is in line with the development trend of high precision and multi-purpose of the mechanical system nowadays. The variable shape mechanism is composed of several rigid segments, rigid members and rotating hinges, which can be used to guide the motion of each rigid piece to approximate a number of curves. These curves define the deformation process of the mechanism. In this paper, the deformation curve based on requirement is analyzed, and two algorithms of processing curve are given. "deformation curve" is called "design contour". Most of the design contours are spline curves, which are not conducive to mechanical design. The design contour is roughly divided into the contours of each linear line segment, which is called "target contour". The contour of the target is still a complete curve, which can not meet the design precision requirement as a component directly, and must be divided into several segments. The "average contour" is obtained from the segmental averaging of the target contour of the logarithmic bar, and the average contour will be taken as a component to enter the stage of mechanism synthesis. Secondly, the shape of the component of the variable shape mechanism is directly related to the curve. After processing the deformation curve, a method of synthesizing the multi-bar series mechanism is presented, including rigid body connection and adding rotating pair. Finally, according to the design principle, an example of the shape variable mechanism is designed to verify the correctness of the design principle, and the shape variable mechanism is modeled and simulated in 3D software. The transmission angle in the motion of the mechanism is also analyzed properly.
【學(xué)位授予單位】：北京郵電大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2011
【分類號】：TH112

【引證文獻】

相關(guān)碩士學(xué)位論文 前1條

1 李馳;結(jié)構(gòu)功能型機構(gòu)的綜合設(shè)計與分析[D];北京郵電大學(xué);2013年

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本文編號：2061813