Design of Large Motion Range and Heavy Duty 2-DOF Spherical Parallel Wrist Mechanism
Koji Ueda*, Hiroya Yamada**, Hiroaki Ishida*, and Shigeo Hirose*
*Department of Mechanical and Aerospace Engineering, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8552, Japan
**Global Edge Institute, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-5880, Japan
Wrist mechanisms are important elements of robotic arms because they significantly affect the arm’s handling ability. Although various wrist mechanisms have been developed to date, a mechanism with a compact structure, a wide range of motion and a large load capacity has not yet been realized. Thus, in this paper, we propose 2-DOF Spherical Parallel (2DSP) mechanism, a heavy-duty wrist mechanism with a large motion range, and clarify its features both analytically and experimentally. The 2DSP mechanism is driven by a 2-DOF spherical parallel mechanism and is supported by a universal joint located at its center. This structure allows the 2DSP mechanism to realize a large motion range and load capacity and simplifies its kinematic analysis. Based on this analysis, we clarify the design process to maximize the motion range and propose a preferable structure of passive joints from the viewpoint of load capacity and production cost. We also describe the detailed design of a 2DSP mechanism for a rescue robot we developed previously and verify the feasibility of the proposed mechanism.
-  M. Guarnieri, I. Takao, E. Fukushima, and S. Hirose, “HELIOS VIII: Toward Practical Robots for Search and Rescue Operations,” J. of Robotics and Mechatronics, Vol.20, No.5, pp. 675-694, 2008.
-  K. Ueda, M. Guarnieri, T. Inoh, P. Debenest, R. Hodoshima, E. Fukushima, and S. Hirose, “Development of HELIOS IX: An Arm-Equipped Tracked Vehicle,” J. of Robotics and Mechatronics, Vol.23, No.6, pp. 1031-1040, 2011.
-  R. Hodoshima, M. Guarnieri, R. Kurazume, H. Masuda, T. Inoh, P. Debenest, E. Fukushima, and S. Hirose, “HELIOS Tracked Robot Team: Mobile RT System for Special Urban Search and Rescue Operations,” J. of Robotics and Mechatronics, Vol.23, No.6, pp. 1041-1054, 2011.
-  M. Rosheim, “Robot wrist actuators,” Wiley, 1989.
-  C. Gosselin and É. St-Pierre, “Development and experimentation of a fast 3-DOF camera-orienting device,” The Int. J. of Robotics Research, Vol.16, No.5, pp. 619-630, 1997.
-  Y. Takeda, H. Funabashi, and Y. Sasaki, “Development of a spherical in-parallel actuated mechanism with three degrees of freedom with large working space and high motion transmissibility: Evaluation of motion transmissibility and analysis of working space,” JSME Int. J. Ser. C, Vol.39, No.3, pp. 541-548, 1996.
-  M. E. Rosheim, “Robot evolution: the development of anthrobotics,” Wiley, 1994.
-  W. Li, J. Sun, J. Zhang, K. He, and R. Du, “A novel parallel 2-DOF spherical mechanism with one-to-one input-output mapping,” In Proc. of the 6thWSEAS Int. Conf. on Robotics, control and manufacturing technology, pp. 6-11, 2006.
-  K. Sone, H. Isobe, and K. Yamada, “High Angle Active Link,” NTN Technical Review, pp. 70-73, 2003.
-  S. Hirose and R. Chu, “Development of a light weight torque limiting M-Drive actuator for hyper-redundant manipulator Float Arm,” In Proc. of IEEE Int. Conf. on Robotics and Automation, Vol.4, pp. 2831-2836, 1999.
-  Y. Huang, Y. Sasaki, Y. Harakawa, E. Fukushima, and S. Hirose, “Development of Anchor Diver III: Easy-to-Operate Tensioned-Tether Type ROV for Underwater Search and Rescue Operations,” J. of Robotics and Mechatronics, Vol.24, No.2, pp. 399-407, 2012.
-  M. Ogata and S. Hirose, “Study on Ankle Mechanism for Walking Robots – Development of 2 D.O.F. Coupled Drive Ankle Mechanism –,” In Proc. of IEEE/RSJ Int. Conf. on Intelligent Robots and Systems, Vol.4, pp. 3201-3206, 2004.
-  P. Wu, Y. Chang, C. Liao, and W. Chieng, “Design for a 2-DOF Motion Platform,” J. of Robotics and Mechatronics, Vol.23, No.1, pp. 19-33, 2011.
-  M. Ogata, K. Yoneda, and S. Hirose, “Study on Ankle Mechanism for Walking Robots – Singularity Analysis of Two D.O.F. Coupled Drive Ankle Mechanism (in Japanese),” In Proc. of 23rd Annual Conf. RSJ, 3G17, 2005.
-  C. Gosselin and J. Angeles, “Singularity analysis of closed-loop kinematic chains,” IEEE Trans. on Robotics and Automation, Vol.6, No.3, pp. 281-290, 1990.
-  S. Bai and M. Hansen, “Evaluation of workspace of a spherical robotic wrist,” In Proc. of IEEE/ASME Int. Conf. on Advanced intelligent mechatronics, pp. 1-6, 2007.
-  L. Zhang, Y. Niu, Y. Li, and Z. Huang, “Analysis of the workspace of 2-DOF spherical 5R parallel manipulator,” In Proc. of IEEE Int. Conf. on Robotics and Automation, pp. 1123-1128, 2006.
-  C. Gosselin, “Stiffness mapping for parallel manipulators,” IEEE Trans. on Robotics and Automation, Vol.6, No.3, pp. 377-382, 1990.
-  X. Liu, Z. Jin, and F. Gao, “Optimum design of 3-DOF spherical parallel manipulators with respect to the conditioning and stiffness indices,” Mechanism and Machine Theory, Vol.35, No.9, pp. 1257-1267, 2000.
-  F. Bidault, C. Teng, and J. Angeles, “Structural optimization of a spherical parallel manipulator using a two-level approach,” Proc. of ASME 2001 Design Engineering Technical Conf., 2001.
-  C. Gosselin and J. Hamel, “The agile eye: A high-performance three-degree-of-freedom camera-orienting device,” In Proc. of IEEE Int. Conf. on Robotics and Automation, Vol.1, pp. 781-786, 1994.
-  P. Larochelle and J.McCarthy, “Static analysis of spherical nR kinematic chains with joint friction,” In Proc. of ASME Flexible mechanisms, dynamics, and analysis, Vol.47, pp. 173-177, 1992.
-  C. Chiang, “Kinematics of spherical mechanisms,” Cambridge University Press, 1988.
-  S. Hirose and K. Motomura, “Rotary Joint Structure,” JP Patent Publication No.2007-152500, 2007.
-  H. Ishida, T. Hagiwara, K. Ueda, and S.Hirose, “Armrest Joystick – Mechanism Design and Basic Experiments –,” In Proc. of IEEE/RSJ Int. Conf. on Intelligent Robots and Systems, pp. 5119-5124, 2012.
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