Paper:
Study on a Variable Stiffness Mechanism Using Wire Spring
Yasuo Hayashibara
Chiba Institute of Technology, 2-17-1 Tsudanuma, Narashino, Chiba, Japan
In this paper, we propose a variable stiffness mechanism using wire springs. We have proposed such kind of mechanism using nonlinear coil springs. We intend to apply it to continuous passive motion (CPM) machine. It can change the spring characteristic continuously. Its disadvantages are need for wide space and powerful motor to change stiffness. And, it is difficult to design such nonlinear spring. To solve these problems, we propose a mechanism with wire springs. It is easy to obtain the wire spring, because it is material of coil spring. We explain how the design and evaluate it in experiments.
- [1] Y. Hyashiba, H. Hakogi, and K. Watanabe, “Study on a CPM Device for Rehabilitation with Variable Stiffness Mechanism,” Proc. of JSME Conf. on Robotics and Mechatronics (ROBOMEC’04), 1A1-H-77(CD-ROM), 2004.
- [2] Y. Hyashiba, H. Hakogi, and K. Watanabe, “Development of a CPM Device for Rehabilitation with Variable Stiffness Mechanism,” Proc. of JSME Conf. on Robotics and Mechatronics (ROBOMEC’03), 2A1-2F-D2(CD-ROM), 2003.
- [3] Y. Hayashiba, “Design of Nonlinear Spring for Variable Stiffness Mechanism,” Proc. of The 20th Annual Conf. of the Robotics Society of Japan, 1M23(CD-ROM), 2002.
- [4] S. Suzaki and Y. Hayashiba, “Study on a Variable Stiffness Mechanism Using Nonlinear Springs,” Proc. of JSME Conf. on Robotics and Mechatronics (ROBOMEC’01), 1A1-H1(CD-ROM), 2001.
- [5] T. Morita and S. Sugano, “New Control Method for Robot Joint by Mechanical Impedance Adjuster, Proposition of Mechanisms and Application to Robot Finger,” Journal of the Robotics Society of Japan, Vol.14, No.1, pp. 131-136, 1996.
- [6] T. Shirai and T. Tomioka, “Proposal of Joint Stiffness Adjustment Mechanism SAT –Analysis and Modeling of SAT–,” Proc. of JSME Conf. on Robotics and Mechatronics (ROBOMEC’03), 2P2-2F-F1 (CD-ROM), 2003.
- [7] I. Mizuuchi, T. Matsuki, S. Kagami, M. Inaba, and H. Inoue, “An Approach to a Humanoid That Has a Variable Flexible Torso,” Proc.s of The 16th Annual Conf. of the Robotics Society of Japan, Vol.2, pp. 825-826, 1998.
- [8] K. Koganezawa, M. Yamazaki, and N. Ishikawa, “Mechanical Stiffness Control of Tendon-Driven Joints,” Journal of the Robotics Society of Japan, Vol.18, No.7, pp. 101-108, 2000.
- [9] K. Tanie and Y. Hayashibara, “New Technologies for Human-Robot Cooperation, Toward Machina Sapiens: New Machine, Compliance Control for Machines and Robots,” SICE Journal of Control, Measurement, and System Integration, Vol.34, No.4, pp. 274-280, 1995.
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