Structural Design and Walking Gait Planning of Wheel-legged AGV
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摘要: 为了提高自动引导小车在存有障碍物的硬质平坦地面上的工作能力,设计了一种新型的轮腿式自动引导小车,并阐述了小车在不同运动模式下的工作原理。对行走模式下的小车进行了运动学分析,得到足端工作空间。以足端的最大工作范围为前提规划了足端的运动轨迹,同时规划了车体的运动轨迹,并基于静态稳定裕度原理规划了小车整体的行走步态。利用ADAMS软件对该小车进行运动仿真分析,仿真结果表明所规划运动轨迹和行走步态是可行的。Abstract: In order to improve the working ability of the automated guided vehicle (AGV) on the hard and flat ground with obstacles, a new type of wheel-legged AGV is designed, and the working principle of the AGV in different motion modes is explained. The kinematics analysis of the AGV in walking mode is carried out, and the working space of its foot is obtained. The motion trajectory of the foot is planned based on the maximum working range of the foot. At the same time, the trajectory of the car body is planned, and the overall walking gait of the AGV is planned based on the static stability margin principle. The motion simulation analysis of the AGV is carried out with the ADAMS. The simulation results show that the motion trajectory and walking gait planned by the scheme are feasible.
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Key words:
- AGV /
- wheel-legged /
- kinematics analysis /
- walking gait /
- trajectory planning
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表 1 连杆参数和关节变量
连杆 ${a_n}/{\rm{mm}}$ ${\alpha _n}/(^\circ )$ ${d_n}/{\rm{mm}}$ ${\theta _n}/(^\circ )$ 1 ${l_1}(97.5)$ $90$ $0$ ${\theta _1}(60 \sim 120)$ 2 ${l_2}(520)$ $0$ $0$ ${\theta _2}(37 \sim 77)$ 3 ${l_3}(500)$ $0$ $0$ ${\theta _3}( - 155 \sim - 82)$ -
[1] 潘希祥, 徐坤, 王耀兵, 等. 具有悬挂系统的轮腿式机器人设计与分析[J]. 机器人, 2018, 40(3): 309-320PAN X X, XU K, WANG Y B, et al. Design and analysis of a wheel-legged robot with a suspension system[J]. Robot, 2018, 40(3): 309-320 (in Chinese) [2] 韩晓建, 商李隐, 杨涌. 四足机器人质心位置规划及稳定性分析[J]. 计算机仿真, 2015, 32(6): 308-313, 359 doi: 10.3969/j.issn.1006-9348.2015.06.069HAN X J, SHANG L Y, YANG Y. Centroid position planning and stability analysis of a quadruped robot[J]. Computer Simulation, 2015, 32(6): 308-313, 359 (in Chinese) doi: 10.3969/j.issn.1006-9348.2015.06.069 [3] 韩金伯. 基于双足机器人步态规划与运动学仿真[J]. 电子技术与软件工程, 2018 (15): 60HAN J B. Gait planning and kinematics simulation based on biped robot[J]. Electronic Technology & Software Engineering, 2018(15): 60 (in Chinese) [4] DENAVIT J, HARTENBERG R S. A kinematic notation for lower-pair mechanisms based on matrices[J]. Journal of Applied Mechanics, 1955, 22: 215-221 [5] 荣学文. SCalf液压驱动四足机器人的机构设计与运动分析[D]. 济南: 山东大学, 2013RONG X W. Mechanism design and kinematics analysis of a hydraulically actuated quadruped robot SCalf[D]. Jinan: Shandong University, 2013 (in Chinese) [6] 王先伟, 吴明晖, 周俊, 等. 名优茶采摘机器人机械手结构参数优化与仿真[J]. 中国农机化学报, 2018, 39(7): 84-89WANG X W, WU M H, ZHOU J, et al. Optimization and simulation of structural parameters of manipulators for high-quality tea picking robots[J]. Journal of Chinese Agricultural Mechanization, 2018, 39(7): 84-89 (in Chinese) [7] 曲梦可, 王洪波, 荣誉. 轮腿混合四足机器人六自由度并联机械腿设计[J]. 农业工程学报, 2017, 33(11): 29-37 doi: 10.11975/j.issn.1002-6819.2017.11.004QU M K, WANG H B, RONG Y. Design of 6-DOF parallel mechanical leg of wheel-leg hybrid quadruped robot[J]. Transactions of the Chinese Society of Agricultural Engineering, 2017, 33(11): 29-37 (in Chinese) doi: 10.11975/j.issn.1002-6819.2017.11.004 [8] 刘燕德, 王观田, 王均刚, 等. 水果无损采摘机械手工作空间分析及参数确定[J]. 农机化研究, 2019, 41(4): 12-17 doi: 10.3969/j.issn.1003-188X.2019.04.003LIU Y D, WANG G T, WANG J G, et al. Workspace analysis and parameter determination of fruit nondestructive picking manipulator[J]. Journal of Agricultural Mechanization Research, 2019, 41(4): 12-17 (in Chinese) doi: 10.3969/j.issn.1003-188X.2019.04.003 [9] 陆卫丽, 卞新高, 焦建, 等. 四足爬行机器人步态分析与运动控制[J]. 机电工程, 2012, 31(7): 839-843LU W L, BIAN X G, JIAO J, et al. Gait analysis and motion control of quadruped robot[J]. Journal of Mechanical & Electrical Engineering, 2012, 31(7): 839-843 (in Chinese) [10] 徐轶群, 万隆君. 四足步行机器人稳定性步态分析[J]. 制造业自动化, 2001, 23(8): 5-7, 21 doi: 10.3969/j.issn.1009-0134.2001.08.002XU Y Q, WAN L J. Stability gait analysis of four-legged walking robot[J]. Manufacturing Automation, 2001, 23(8): 5-7, 21 (in Chinese) doi: 10.3969/j.issn.1009-0134.2001.08.002 [11] 杨超峰. 液压四足机器人的步态规划研究[D]. 北京: 北京理工大学, 2015YANG C F. Research on gait planning for a hydraulic quadruped robot[D]. Beijing: Beijing Institute of Technology, 2015 (in Chinese) [12] 柳洪义, 宋伟刚, 彭兆行. 控制步行机足运动的一种方法−修正组合摆线法[J]. 机器人, 1994, 16(6): 350-356LIU H Y, SONG W G, PENG Z X. Foot movement control of walking machines modified by means of composite cycloid method[J]. Robot, 1994, 16(6): 350-356 (in Chinese) [13] 张婷. 液压四足机器人的动步态规划研究[D]. 北京: 北京理工大学, 2016ZHANG T. Research on dynamic gait planning for a hydraulic quadruped robot[D]. Beijing: Beijing Institute of Technology, 2016 (in Chinese) [14] 殷勇华, 卞新高, 陆卫丽. 液压驱动四足机器人步态规划和运动控制[J]. 机电工程, 2014(7): 29-33YIN Y H, BIAN X G, LU W L. Gait planning and motion control on the hydraulic pressure actuated quadruped robot[J]. Journal of Mechanical & Electrical Engineering, 2014(7): 29-33 (in Chinese) [15] 庄明, 俞志伟, 龚达平, 等. 基于ADAMS的液压驱动四足机器人步态规划与仿真[J]. 机械设计与制造, 2012 (7): 100-102ZHUANG M, YU Z W, GONG D P, et al. Gait planning and simulation of quadruped robot with hydraulic drive based on ADAMS[J]. Machinery Design & Manufacture, 2012 (7): 100-102 (in Chinese)