Abstract:A shape control algorithm for soft robot inspired by octopus is presented. Because of the infinite degrees of freedom of soft robot, the control algorithm for the rigid robot is not applicable. According to the movement characteristics of soft robot, the shape control parameters are derived. Then the kinematics model of the soft robot is developed, and the relation between soft robot shape parameters and driving cables length is deduced. From this relation, a shape control algorithm is designed. The stability of the shape control algorithm is proved through Lyapunov theory. Finally, the effectiveness of the shape control algorithm is verified by experiments.
[1] Guglielmino E, Tsagarakis N, Caldwell D G. An octopus anatomy-inspired robotic arm[C]//IEEE/RSJ International Conference on Intelligent Robots and Systems. Piscataway, USA: IEEE, 2010: 3091-3096.
[2] Kim S, Laschi C, Trimmer B. Soft robotics: A bioinspired evolution in robotics[J]. Trends in Biotechnology, 2013, 31(5): 287-294.
[3] Cianchetti M, Ranzani T, Gerboni G, et al. Soft robotics technologies to address shortcomings in today's minimally invasive surgery: The STIFF-FLOP approach[J]. Soft Robotics, 2014, 1(2): 122-131.
[4] 高飞,王玉魁,王振龙,等.形状记忆合金丝驱动的仿生墨鱼水下机器人的原型设计[J].机器人,2013,35(3):346-351.Gao F, Wang Y K, Wang Z L, et al. Prototype design of a kind of biomimetic cuttlefish underwater robot actuated by SMA wires[J]. Robot, 2013, 35(3): 346-351.
[5] Kim B, Kim D H, Jung J H, et al. A biomimetic undulatory tadpole robot using ionic polymer-metal composite actuators[J]. Smart Materials and Structures, 2005, 14(6): 1579-1585.
[6] Cianchetti M, Ranzani T, Gerboni G, et al. STIFF-FLOP surgical manipulator: Mechanical design and experimental characterization of the single module[C]//IEEE/RSJ International Conference on Intelligent Robots and Systems. Piscataway, USA: IEEE, 2013: 3576-3581.
[7] Deng T, Wang H S, Chen W D, et al. Development of a new cable-driven soft robot for cardiac ablation[C]//IEEE International Conference on Robotics and Biomimetics. Piscataway, USA: IEEE, 2013: 728-733.
[8] Wang H S, Chen W D, Yu X J, et al. Visual servo control of cable-driven soft robotic manipulator[C]//IEEE/RSJ International Conference on Intelligent Robots and Systems. Piscataway, USA: IEEE, 2013: 57-62.
[9] Jones B A, McMahan W, Walker I. Design and analysis of a novel pneumatic manipulator[C]//3rd IFAC Conference on Mechatronic Systems. 2004: 745-750.
[10] McMahan W, Jones B A, Walker I D. Design and implementation of a multi-section continuum robot: Air-Octor[C]// IEEE/RSJ International Conference on Intelligent Robots and Systems. Piscataway, USA: IEEE, 2005: 2578-2585.
[11] 俞晓瑾.柔性机械臂的运动学和动力学建模及视觉伺服控制[D].上海:上海交通大学,2013.Yu X J. Kinematics and dynamics modeling and visual servo control for soft robotic manipulator[D]. Shaihai: Shanghai Jiao Tong University, 2013.