JRM Vol.34 No.2 pp. 328-338
doi: 10.20965/jrm.2022.p0328


Robostrich Arm: Wire-Driven High-DOF Underactuated Manipulator

Kenji Misu*1, Masahiro Ikeda*2, Keung Or*2, Mitsuhito Ando*3, Megu Gunji*4, Hiromi Mochiyama*1, and Ryuma Niiyama*2

*1University of Tsukuba
1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, Japan

*2The University of Tokyo
7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan

*3Ritsumeikan University
1-1-1 Noji-higashi, Kusatsu, Shiga 525-8577, Japan

*4Toyo University
1-1-1 Izumino, Itakura-machi, Ora-gun, Gunma 374-0113, Japan

October 4, 2021
February 14, 2022
April 20, 2022
soft robotics, manipulator, bio-inspired, ostrich

We propose a wire-driven robotic arm inspired by the ostrich neck. It can pick up a small piece of feed from the ground while colliding with it. This arm is named robostrich arm (shortened form of robotic ostrich arm). It consists of a serial chain of 18 rigid bodies connected by free rotational joints that are designed to have angle limitations similar to the bones of a real ostrich. It moves in a vertical plane and is driven by two DC motors through antagonistic wires. The task considered in this study was to lift the arm tip (the “head” of the robostrich arm). The experimental results indicate that the tensioner balance and timing between the two wires are important for achieving the head-up task. This paper indicates the contribution of antagonist muscles to the performance of head-up tasks by high-degree-of-freedom underactuated manipulators in robotics and ostrich necks in biological studies.

Robostrich arm: wire-driven high-DOF underactuated manipulator

Robostrich arm: wire-driven high-DOF underactuated manipulator

Cite this article as:
K. Misu, M. Ikeda, K. Or, M. Ando, M. Gunji, H. Mochiyama, and R. Niiyama, “Robostrich Arm: Wire-Driven High-DOF Underactuated Manipulator,” J. Robot. Mechatron., Vol.34 No.2, pp. 328-338, 2022.
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Last updated on May. 10, 2024