A Stair-climbing Gait of a Multi-mode Omni-directional Mobile Robot
CHEN Cheng1, LENG Jie1, LI Qingdu1, HOU Yunfeng2, Lü Tao2
1. School of Optical Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China; 2. Institute of Machine Intelligence, University of Shanghai for Science and Technology, Shanghai 200093, China
Abstract:A multi-mode omni-directional mobile robot capable of climbing stairs is designed to deal with some complex terrains that the mobile robots encounter when moving in outdoor environments, such as steps and stairs. By switching among different motion modes, the robot can move rapidly like traditional robots while possessing an obstacle-surmounting ability like legged robots. Firstly, the kinematics model of the multi-mode omni-directional mobile robot is analyzed and constructed. Secondly, the relationship between the obstacle-surmounting ability and the center-of-mass position of the robot is studied, and the maximum height of steps that the robot can climb over is calculated. Finally, a stair-climbing method is proposed. The experimental results show that the designed obstacle-surmounting method enables the multi-mode omnidirectional mobile robot to successfully and stably climb steps. The maximum height of the step climbed over is 20.94 cm, the maximum angle of the slope climbed over is 35°, and the minimum turning radius is 0 cm.
[1] Ortigoza R S, Marcelino-Aranda M, Ortigoza G S, et al.Wheeled mobile robots:A review[J].IEEE Latin America Transactions, 2012, 10(6):2209-2217. [2] Nowac W, González F, MacMahon S, et al.Performance indicators for wheeled robots traversing obstacles[J].IEEE Robotics and Automation Letters, 2020, 5(2):2881-2888. [3] Chen W H, Lin H S, Lin Y M, et al.TurboQuad:A novel legwheel transformable robot with smooth and fast behavioral transitions[J].IEEE Transactions on Robotics, 2017, 33(5):1025-1040. [4] 吉洋,霍光青.履带式移动机器人研究现状[J].林业机械与木工设备, 2012, 40(10):7-10.Ji Y, Huo G Q.Research status of track-type mobile robots[J].Forestry Machinery&Woodworking Equipment, 2012, 40(10):7-10. [5] 陆冬平.仿生四足-轮复合移动机构设计与多运动模式步态规划研究[D].合肥:中国科学技术大学, 2015.Lu D P.Research on the design of bionic quadruped-wheel compound moving mechanism and multi-motion mode gait planning[D].Hefei:University of Science and Technology of China, 2015. [6] Raibert M, Blankespoor K, Nelson G, et al.BigDog, the roughterrain quadruped robot[J].IFAC Proceedings Volumes, 2008, 41(2):10822-10825. [7] 丁良宏,王润孝,冯华山,等.浅析BigDog四足机器人[J].中国机械工程, 2012, 23(5):505-514.Ding L H, Wang R X, Feng H S, et al.Brief analysis of a BigDog quadruped robot[J].China Mechanical Engineering, 2012, 23(5):505-514. [8] 李潮,崔承勋.四足仿生机器人的设计[J].南方农机, 2020, 51(7):37,40.Li C, Cui C X.The design of a four-legged bionic robot[J].Southern Agricultural Machinery, 2020, 51(7):37,40. [9] 沙群,宗光华.越野机器人多杆悬架的越障分析[J].机械工程与自动化, 2014(6):47-48,51.Sha Q, Zong G H.Analysis of obstacle-surmounting ability of cross-country robot with multi-link suspension[J].Mechanical Engineering&Automation, 2014(6):47-48,51. [10] 高伟贤,王虹玲.仿生机器人的研究进程与发展前景研究[J].黑龙江科学, 2018, 9(1):26-27.Gao W X, Wang H L.Research progress and development prospect of bionic robot[J].Heilongjiang Science, 2018, 9(1):26-27. [11] Kikuchi K, Sakaguchi K, Sudo T, et al.A study on a wheelbased stair-climbing robot with a hopping mechanism[J].Mechanical Systems and Signal Processing, 2008, 22(6):1316-1326. [12] 苏世勇.爬楼梯机器人[J].中国科技信息, 2014(14):168-169.Su S Y.Stair climbing robot[J].China Science and Technology Information, 2014(14):168-169. [13] Lawn M J, Sakai T, Kuroiwa M, et al.Development and practical application of a stairclimbing wheelchair in Nagasaki[J].Journal of HWRS-ERC, 2001, 2(2):33-39. [14] 朱花,汪舟,夏再炎,等.新型自动爬楼梯轮椅的设计[J].机械传动, 2015, 39(3):90-92.Zhu H, Wang Z, Xia Z Y, et al.Design of a new type of automatic stair climbing wheelchair[J].Journal of Mechanical Transmission, 2015, 39(3):90-92. [15] 章玮滨,唐炜.行星轮式爬楼梯轮椅的设计与分析[J].机械传动, 2019, 43(8):103-106,115.Zhang W B, Tang W.Design and analysis of planetary wheeled stair-climbing wheelchair[J].Journal of Mechanical Transmission, 2019, 43(8):103-106,115. [16] Fang L X, Lu T, He W H, et al.Dynamic and tip-over stability analysis of a planetary wheeled stair-climbing wheelchair[C]//IEEE International Conference on Mechatronics and Automation.Piscataway, USA:IEEE, 2012.DOI:10.1109/ICMA.2012.6285747. [17] Qin H, He L P, Xing L Q, et al.Kinematics analysis and simulation verification for the chassis of mobile robots based on an obstacle-crossing index[C]//Global Reliability and Prognostics and Health Management.Piscataway, USA:IEEE, 2020:1-6. [18] Pan L H, Kuo C N, Huang C Y, et al.The claw-wheel transformable hybrid robot with reliable stair climbing and high maneuverability[C]//IEEE International Conference on Automation Science and Engineering.Piscataway, USA:IEEE, 2016:233-238. [19] Kim Y, Kim J, Kim H S, et al.Curved-spoke tri-wheel mechanism for fast stair-climbing[J].IEEE Access, 2019, 7:173766-173773. [20] Yang D, Bewley T.A minimalist stair climbing robot (SCR) formed as a leg balancing&climbing mobile inverted pendulum (MIP)[C]//IEEE/RSJ International Conference on Intelligent Robots and Systems.Piscataway, USA:IEEE, 2018:2464-2469. [21] Zhang D, Xuan J P, Yang Y S, et al.The design of a scissor stair climbing robot[C]//7th International Conference on Automation, Robotics and Applications.Piscataway, USA:IEEE, 2021:10-15. [22] 徐俊翊,陶卫军,张涵.新型载人爬楼梯履带车设计及稳定性分析[J].兵工自动化, 2019, 38(1):88-92.Xu J Y, Tao W J, Zhang H.Design and stability analysis of new manned stair-climbing wheelchair[J].Ordnance Industry Automation, 2019, 38(1):88-92.