本文選題：6R型機(jī)器人 + 精度分析��； 參考：《哈爾濱工業(yè)大學(xué)》2017年碩士論文

【摘要】：隨著工業(yè)化的發(fā)展,工業(yè)機(jī)器人已逐步成為核心裝備,且越來越多的行業(yè)對其精度有了較高的要求,因此開展工業(yè)機(jī)器人的定位精度的研究尤其重要。本文以6R型工業(yè)機(jī)器人為對象,從運(yùn)動(dòng)學(xué)的角度,對誤差源中確定性的結(jié)構(gòu)參數(shù)誤差和隨機(jī)性的關(guān)節(jié)間隙誤差進(jìn)行定位誤差分析。根據(jù)誤差特性對結(jié)構(gòu)參數(shù)誤差進(jìn)行運(yùn)動(dòng)學(xué)標(biāo)定,通過閉環(huán)約束標(biāo)定方式和基于約束模型的辨識方法,標(biāo)定得到準(zhǔn)確的參數(shù)值,提高6R機(jī)器人絕對定位精度。利用幾何法和蒙特卡洛法,求解出機(jī)器人工作空間;利用正逆運(yùn)動(dòng)學(xué),分析機(jī)器人各結(jié)構(gòu)參數(shù)對末端位置精度的影響,得出對機(jī)器人精度的影響規(guī)律。使用矢量法對關(guān)節(jié)間隙建模,基于概率論,分析機(jī)器人的二、三關(guān)節(jié)間隙對末端位置誤差的影響,得到的誤差分布能有效的指導(dǎo)機(jī)器人的設(shè)計(jì)、使用和維護(hù),以保證其重復(fù)定位精度�；谖⒎诌\(yùn)動(dòng)學(xué),建立考慮幾何參數(shù)的6R型串聯(lián)機(jī)器人的誤差傳遞模型,并通過Matlab仿真驗(yàn)證參數(shù)誤差模型的準(zhǔn)確性。針對機(jī)器人閉環(huán)約束自標(biāo)定方法,研究分析基于點(diǎn)、平面、球面約束的標(biāo)定方法,提出一種新型的球心距離標(biāo)定方法。分別對牛頓法、最小二乘法、下山單純形法進(jìn)行比較分析,找到最適合誤差參數(shù)標(biāo)定模型的辨識方法。針對參數(shù)的可辨識性,剔除無法辨識的參數(shù),分析確定了17項(xiàng)待辨識參數(shù)。使用基于DETMAX的增減算法,對標(biāo)定實(shí)驗(yàn)中的測量位姿進(jìn)行篩選,使位姿信息參與誤差辨識,提高參數(shù)辨識的準(zhǔn)確度。對單球面約束標(biāo)定實(shí)驗(yàn)進(jìn)行仿真,使用Nelder-Mead算法進(jìn)行參數(shù)辨識,補(bǔ)償后位置點(diǎn)更趨于擬合球面,表明球面模型標(biāo)定具有可行性。為了驗(yàn)證所提出的標(biāo)定方法的有效性,針對不使用外部測量儀器的機(jī)器人自標(biāo)定,采用平面約束和球心距離約束的方式,進(jìn)行了兩組標(biāo)定實(shí)驗(yàn)。分別對采集到的測量點(diǎn)進(jìn)行數(shù)據(jù)處理,通過下山單純形法辨識得到結(jié)構(gòu)參數(shù)偏差,在機(jī)器人控制器中對其進(jìn)行補(bǔ)償,得出實(shí)驗(yàn)結(jié)論。
[Abstract]:With the development of industrialization, industrial robot has gradually become the core equipment, and more industries have higher requirements for its precision, so it is particularly important to research the positioning accuracy of industrial robot. In this paper, a 6R industrial robot is used as an object. From the point of view of kinematics, the positional errors of deterministic structural parameters and random joint clearance errors in the error source are analyzed. According to the error characteristics, the kinematic calibration of the structural parameters error is carried out. Through the closed-loop constraint calibration method and the identification method based on the constraint model, the accurate parameter values are obtained and the absolute positioning accuracy of the 6R robot is improved. By using geometric method and Monte Carlo method, the workspace of robot is solved, and the influence of robot structural parameters on the precision of terminal position is analyzed by using forward and inverse kinematics, and the law of influence on robot precision is obtained. Using the vector method to model the joint gap, based on the probability theory, the influence of the second and third joint clearance on the end position error of the robot is analyzed. The error distribution can effectively guide the design, use and maintenance of the robot. In order to ensure its repeat positioning accuracy. Based on differential kinematics, the error transfer model of 6R series robot with geometric parameters is established, and the accuracy of the error model is verified by Matlab simulation. Aiming at the self-calibration method of robot with closed-loop constraint, the calibration method based on point, plane and sphere constraints is studied, and a new calibration method of spherical center distance is proposed. The Newton method, the least square method and the downhill simplex method are compared and analyzed respectively to find the most suitable identification method for the error parameter calibration model. In view of the identifiability of the parameters, 17 parameters are determined by eliminating the unidentifiable parameters. In order to improve the accuracy of parameter identification, an algorithm based on DETMAX is used to screen the measurement position and pose in the calibration experiment, so that the position and attitude information can participate in the error identification and improve the accuracy of parameter identification. The experiment of single sphere constraint calibration is simulated and the parameter identification is carried out by using Nelder-Mead algorithm. After compensation the position points tend to fit the spherical surface which indicates that the calibration of spherical model is feasible. In order to verify the effectiveness of the proposed calibration method, two sets of calibration experiments were carried out for robot self-calibration without external measuring instruments, using plane constraint and spherical center distance constraint. The measured points are processed separately and the deviation of structural parameters is obtained by using the downhill simplex method. The error of structure parameters is compensated in the robot controller and the experimental results are obtained.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TP242.2

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 李睿;趙陽;;機(jī)器人熱影響模型分析及動(dòng)態(tài)精度補(bǔ)償[J];紅外與激光工程;2015年08期

2 余躍慶;田浩;;運(yùn)動(dòng)副間隙引起的并聯(lián)機(jī)器人誤差及其補(bǔ)償[J];光學(xué)精密工程;2015年05期

3 胥素芳;王俞;;基于空間絕對距離的機(jī)器人自標(biāo)定研究[J];制造業(yè)自動(dòng)化;2015年09期

4 石慧;王小純;高德中;潘宇晨;張林;蔡敢為;;新型平面可控裝載機(jī)構(gòu)運(yùn)動(dòng)學(xué)建模與分析[J];廣西大學(xué)學(xué)報(bào)(自然科學(xué)版);2014年05期

5 張亞娟;裘祖榮;李杏華;楊婷;;激光跟蹤系統(tǒng)“鳥巢”坐標(biāo)的球面標(biāo)定法[J];天津大學(xué)學(xué)報(bào)(自然科學(xué)與工程技術(shù)版);2014年03期

6 許衛(wèi)斌;平雪良;應(yīng)再恩;杜永忠;李正洋;;6R型串聯(lián)機(jī)器人工作空間快速求解方法[J];機(jī)械設(shè)計(jì);2013年06期

7 許輝;王振華;陳國棟;孫立寧;;基于距離精度的工業(yè)機(jī)器人標(biāo)定模型[J];制造業(yè)自動(dòng)化;2013年11期

8 黃晨華;張鐵;謝存禧;;工業(yè)機(jī)器人位姿誤差建模與仿真[J];華南理工大學(xué)學(xué)報(bào)(自然科學(xué)版);2009年08期

9 丁希侖;周樂來;周軍;;機(jī)器人的空間位姿誤差分析方法[J];北京航空航天大學(xué)學(xué)報(bào);2009年02期

10 楊強(qiáng);孫志禮;閆明;周鵬;;一種新型并聯(lián)機(jī)構(gòu)位姿誤差建模及靈敏度分析[J];中國機(jī)械工程;2008年14期

相關(guān)碩士學(xué)位論文 前5條

1 董釗;基于局部指數(shù)積模型的關(guān)節(jié)式坐標(biāo)測量機(jī)建模及標(biāo)定方法研究[D];合肥工業(yè)大學(xué);2015年

2 丁學(xué)亮;Staubli工業(yè)機(jī)器人標(biāo)定算法和實(shí)驗(yàn)研究[D];浙江理工大學(xué);2014年

3 鄧永剛;工業(yè)機(jī)器人重復(fù)定位精度與不確定度研究[D];天津大學(xué);2014年

4 吳楚鋒;可重構(gòu)機(jī)械臂普適性運(yùn)動(dòng)學(xué)建模及任務(wù)規(guī)劃方法研究[D];北京郵電大學(xué);2013年

5 南小海;6R型工業(yè)機(jī)器人標(biāo)定算法與實(shí)驗(yàn)研究[D];華中科技大學(xué);2008年

，

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