Kinematics Error Calibration Based on Genetic Algorithm
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摘要: 为了提高空间对接试验平台的对接精度,对其进行了误差分析及标定研究。在并联机构运动学正解和逆解的基础上,利用全微分法推导出了并联六自由度机构的运动学误差标定模型。为了更加有效地对各个误差源进行误差辨识,提出了一种基于遗传算法以矩阵条件数为优化目标、对并联机构的标定测量点进行优化筛选的方法,以降低测量噪声对标定结果的影响。当采用较少的测量数据时,仍然能够取得较好的标定效果,具有较好的抗干扰能力。最后,利用数值仿真算例验证了该方法的有效性。Abstract: In order to improve the accuracy of space docking platform, it's necessary to analyze the errors and research the error calibration. Based on forward kinematics solution and inverse solution model, the kinematics error calibration model of 6-DOF parallel mechanism is established with total differential method. For the sake of identifying the value of each error more effective, a new error calibration method based on the genetic algorithm to search the optimal measuring points for calibration is proposed to reduce the effect of measurement noise during the calibration, in which the matrix condition number as the optimization objective. The results show that the calibration is effective even with less measurement points; it has the better anti-noise capability. At last, the effectiveness of proposed method is validated with numerical simulation method.
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Key words:
- calibration /
- computer simulation /
- degrees of freedom (mechanics) /
- efficiency
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[1] 于大泳.六自由度运动模拟器精度分析及其标定[D].哈尔滨:哈尔滨工业大学,2006:1-2 Yu D Y. Accuracy analysis and calibration of six-dof motion simulator[D]. Harbin: Harbin Institute of Technology, 2006:1-2 (in Chinese) [2] 李振,张玉茹,刘军传.一种基于机器视觉的机器人标定方法[J].机械设计与研究,2007,23(3):66-69 Li Z, Zhang Y R, Liu J C. A machine vision based robot calibration method[J]. Machine Design and Research, 2007,23(3):66-69 (in Chinese) [3] 刘文涛,唐德威,王知行.Stewart平台机构标定的鸡尾酒法[J].机械工程学报,2004,40(12):48-52 Liu W T, Tang D W, Wang Z X. Cocktail method for Stewart platform calibration[J]. Chinese Journal of Mechanical Engineering, 2004,40(12):48-52 (in Chinese) [4] 孙小勇,谢志江,石万凯,等.6-PSS并联机构误差分析及标定[J].计算机集成制造系统,2012,18(12):2659-2666 Sun X Y, Xie Z J, Shi W K, et al. Error analysis and calibration of 6-PSS parallel mechanism[J]. Computer Integrated Manufacturing Systems, 2012,18(12):2659-2666 (in Chinese) [5] Yao R, Zhu W B, Huang P. Accuracy analysis of stewart platform based on interval analysis method[J]. Chinese Journal of Mechanical Engineering, 2013,26(1):29-34 [6] 郭剑鹰,吕恬生,王乐天.工业机器人运动学参数误差两步识别法[J].上海交通大学学报,2003,37(11):1670-1674 Guo J Y, Lü T S, Wang L T. Kinematic parameter error identification for industrial robot with two-step procedure[J]. Journal of Shanghai Jiaotong University, 2003,37(11):1670-1674 (in Chinese) [7] Huang T, Chetwynd D G, Whitehouse D J, et al. A general and novel approach for parameter identification of 6-DOF parallel kinematic machines[J]. Mechanism and Machine Theory, 2005,40(2):219-239 [8] 张文昌,梅江平,刘艺,等.基于激光跟踪仪的Delta并联机构运动学误差标定[J].天津大学学报(自然科学与工程技术版),2003,46(3):257-262 Zhang W C, Mei J P, Liu Y, et al. Calibration of delta parallel robot kinematic errors based on laser tracker[J]. Journal of Tianjin University (Science and Technology), 2003,46(3):257-262 (in Chinese) [9] Renaud P, Vivas A, Andreff N, et al. Kinematic and dynamic identification of parallel mechanisms[J]. Control Engineering Practice, 2006,14(1):1099-1109 [10] 白玉净.6-PUS并联机床正解研究及其应用[D].秦皇岛:燕山大学,2012:6-8 Bai Y J. Direct kinematics and application for 6-PUS parallel manipulator[D]. Qinhuangdao: Yanshan University, 2012:6-8 (in Chinese)
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