ACTA AERONAUTICAET ASTRONAUTICA SINICA >
Research on the Stiffness Performance for Robot Machining Systems
Received date: 2013-03-04
Revised date: 2013-04-25
Online published: 2013-07-01
Supported by
Fundamental Research Funds for the Central Universities (2012FZA4004); National Key Technology Research and Development Program of China (2011BAF13B10)
Industrial robot is widely used in aviation manufacturing for its high precision, high efficiency and good expansibility. However, the low stiffness of a serial structure has been a primary factor affecting the end positioning accuracy and dynamic properties. This paper studies the stiffness property optimization for a redundant robot with an extra 7th axis. First, the joint stiffness values are obtained by experiment identification based on a conventional stiffness model. Then a genetic algorithm is employed to conduct the posture optimization under a given position and orientation constraint so as to allow the length of the semiaxis of the stiffness ellipsoid to reach its maximum along the normal direction of the workpiece. Finally,contrast experiments are carried out and the results show that the optimization method is of great significance for enhancing the positioning precision and improving machining properties.
QU Weiwei , HOU Penghui , YANG Genjun , HUANG Guanping , YIN Fucheng , SHI Xin . Research on the Stiffness Performance for Robot Machining Systems[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2013 , 34(12) : 2823 -2832 . DOI: 10.7527/S1000-6893.2013.0227
[1] Bi S S, Liang J, Zhan Q, et al. Applications of robotics technology in aviation industry. Aeronautical Manufacturing Technology, 2009(4):34-39.(in Chinese) 毕树生, 梁杰, 战强, 等. 机器人技术在航空工业中的应用.航空制造技术, 2009(4):34-39.
[2] Zhang H, Wang J J, Zhang G G. Machining with flexible manipulator: toward improving robotic machining performance. Proceedings of the 2005 IEEE/ASME International Conference on Advanced Intelligent Mechatronics Monterey, 2005:1127-1132.
[3] Qu W W, Dong H Y, Ke Y L. Pose accuracy compensaion technology in robot-aid aircraft assembly drilling process. Acta Aeronautica et Astronautica Sinica, 2011, 32(10):1951-1960.(in Chinese) 曲巍崴, 董辉跃, 柯映林. 机器人辅助飞机装配制孔中位姿精度补偿技术. 航空学报, 2011, 32(10): 1951-1960.
[4] Wang M X, Wang P F, Song Y M, et al. Stiffness analysis of a 4-DOF hybrid robot. Journal of Mechanical Engineering, 2011, 47(15):9-16.(in Chinese) 汪满新, 王攀峰, 宋轶民, 等. 4自由度混联机器人静刚度分析. 机械工程学报, 2011, 47(15):9-16.
[5] Du Z C, Yu Y Q, Liu S Z. Stiffness analysis of parallel robot with flexible links. Machine Design, 2007, 24(9):32-34. (in Chinese) 杜兆才, 余跃庆, 刘善增. 含弹性杆件的并联机器人刚度分析. 机械设计, 2007, 24(9): 32-34.
[6] Huang C T, Hung W-H, Kao I. New conservative stiffness mapping for the Stewart-Gough platform. Proceedings of the 2002 IEEE International Conference on Robotics & Automation, 2002:823-828.
[7] Niku S B. Introduction to robotics—analysis, system and application. Sun F C, Zhu J H, Liu G D, translated. Beijing: Publishing House of Electronics Industry, 2004: 107-130. (in Chinese) Niku S B. 机器人学导论——分析、系统及应用. 孙富春, 朱纪洪, 刘国栋, 译. 北京: 电子工业出版社, 2004: 107-130.
[8] Chen S-F, Kao I. Geometrical approach to the conservative congruence transformation (CCT) for robotics stiffness control. Proceedings of the 2002 IEEE International Conference on Robotics & Automation, 2002: 544-549.
[9] Ang Jr M H, Wang W, Loh R N K, et al. Passive compliance from robot limbs and its usefulness in robotic automation. Journal of Intelligent and Robotic Systems, 1997, 20 (1): 1-21.
[10] Pashkevich A, Klimchik A, Chablat D. Enhanced stiffness modeling of manipulators with passive joints. Mechanism and Machine Theory, 2011, 46(5): 662-679.
[11] Zargarbashi S H H, Khan W, Angeles J. The Jacobin condition number as a dexterity index in 6R machining robots. Robotics and Computer-Integrated Manufacturing, 2012, 28(6):694-699.
[12] Xiong Y L, Ding H, Liu E C, et al. Robotics. Beijing: China Machine Press, 1993: 10-100. (in Chinese) 熊有伦, 丁汉, 刘恩沧, 等.机器人学. 北京:机械工业出版社, 1993: 10-100.
[13] Cai Z X. Robotics. Beijing:Tsinghua University Press, 2000: 46-126. (in Chinese) 蔡自兴. 机器人学. 北京:清华大学出版社, 2000:46-126.
[14] Abele E, Weigold M, Rothenbucher S. Modeling and identification of a industrial robot for machining applications. Annals of the CIRP, 2007, 56(1): 387-390.
[15] Dumas C, Caro S, Garnier S, et al. Joint stiffness identification of six-revolute industrial serial robots. Robotics and Computer-Integrated Manufacturing, 2011, 27(4):881-888.
[16] Dumas C, Caro S, Cherif M, et al. A methodology for joint stiffness dentification of serial robots. The 2010 IEEE/RSJ International Conference on Intelligent Robots and Systems, 2010: 464-469.
[17] Shi L J. Study on the static stiffness and dynamics for a 3-DOF robot with flexible joints. Qinhuangdao: College of Mechanical Engineering, Yanshan University, 2006. (in Chinese) 师丽菊. 三自由度弹性铰链机器人静刚度与动力学研究. 秦皇岛: 燕山大学机械工程学院, 2006.
[18] Angeles J. On the nature of the Cartesian stiffness matrix. Ingenieria Mecanica, Tecnologia Y Desarrollo, 2010, 3(5): 163-170.
[19] Yang Y, Zhang Q X. Optimal grasping planning of multi-fingered dexterous hands based on generalized force ellipsoid. Mechanical Science and Technology, 2001, 20(4): 547-550.(in Chinese) 杨洋, 张启先. 多指灵巧手基于广义力椭球的最优抓持规划. 机械科学与技术, 2001, 20(4): 547-550.
[20] Yan R, Chen W, Peng F Y, et al. Closed-loop stiffness modeling and stiffness index analysis for multi-axis machining system. Journal of Mechanical Engineering, 2012, 48(1): 177-184. (in Chinese) 闫蓉, 陈威, 彭芳瑜, 等. 多轴加工系统闭链刚度场建模与刚度性能分析. 机械工程学报, 2012, 48(1): 177-184.
[21] Wang Y X, Wu C, Hu X X, et al. Annealing-genetic algorithm for constrained optimization problems.High Technology Letters, 2004, 14(7): 10-14. (in Chinese) 王跃宣, 吴澄, 胡昔祥, 等. 求解约束优化问题的退火遗传算法. 高技术通讯, 2004, 14(7): 10-14.
[22] Mu S, Su H, Mao W J, et al. A new genetic algorithm to handle the constrained optimization problem. Proceedings of the 41st IEEE Conference on Decision and Control, 2002: 739.
[23] Wu Q Z. Operational research and the optimum method. Beijing: China Machine Press, 2008: 129-156. (in Chinese) 吴祁宗.运筹学与最优化方法. 北京:机械工业出版社, 2008: 129-156.
[24] Lei Y J, Zhang S W, Li X W. MATLAB genetic algorithm toolbox and application. Xi'an: Xidian University Press, 2005: 95-105. (in Chinese) 雷英杰, 张善文, 李续武. MATLAB遗传算法工具箱及应用. 西安: 西安电子科技大学出版社, 2005: 95-105.
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