Abstract:A new "separated → partly constrained → fully constrained" progressive docking method and a claw-shaped docking mechanism are presented to fulfill rigid docking operation between robots in rugged terrain. This mechanism can achieve attitude adjustment in pitch and yaw directions, and control flare angle between two grippers by changing cam slot form. This claw-shaped docking mechanism can fulfill multiple tasks such as object-grasping, rigid docking and mutual cooperation among multiple robots. Kinematics of this mechanism is analyzed. The workspace, and forward and inverse kinematics of this mechanism are deduced. JL-2 modular mobile robot system based on this mechanism is developed, and performance of the proposed claw-shaped docking mechanism is verified by experiments. The results prove that this mechanism has strong offset rectifying capacity and large grasping range to accomplish multiple tasks such as docking and cooperation in multi-robot system.
[1] Jorgensen M W,Ostergaard E H,Lund H H.Modular ATRON:Modules for a self-reconfigurable robot[C]//IEEE/RSJ International Conference on Intelligent Robots and Systems.Piscataway,NJ,USA:IEEE,2004:2068-2073.
[2] EGo T,Roderich G,Vito T,el al.Cooperation through selfassembly in multi-robot systems[J].ACM Transactions on Autonomous and Adaptive Systems,2006,1(2):115-150.
[3] Kawakami A,Torii A,Motomura K,el al.SMC rover:Planetary rover with transformable whecls[C]//41 st SICE Annual Conference.Piscataway,NJ,USA:IEEE,2002:157-162.
[4] Guarnieri M,Takao I,Fukushima E E el al.HELIOS Ⅷ search and rescue robot:Design of an adaptive gripper and system improvements[C]//IEEE/RSJ International Conference on Intelligent Robots and Systems.Piscataway,N J,USA:IEEE,2007:1775-1780.
[5] Khoshnevis B,Will P,Shen W M.Highly compliant and selftightening docking modules for precise and fast connection of self-reconfigurable robots[C]//IEEE International Conference on Robotics and Automation.Piscataway,NJ,USA:IEEE,2003:2311-2316.
[6] 邓志诚,王巍,宗光华.用于可重构地面移动机器人的主动球铰[J].北京航空航天大学学报,2006,32(12):1455-1458.Deng Zhicheng,Wang Wei,Zong Guanghna.Active spherical joint for modular reconfignrable mobile robot[J].Jonmal of Beijing University of Aeronautics and Astronautics,2006,32(12):1455-1458.
[7] 王巍,张厚祥,邓志诚,等.基于串并联机构的自重构移动机器人[J].机械工程学报,2008,44(5):92-101.Wang Wei,Zhang Houxiang,Deng Zhicheng,el al.Reconfigurable mobile robot based on serial and parallel mechanism[J].Chinese Journal of Mechanical Engineering,2008,44(5):92-101.