Development and Attitude Control of Flexible Robot Arm Using Flexible Pneumatic Cylinder with Simple Structure
Tetsuya Akagi, Shujiro Dohta, Feifei Zhao,
and Takahiro Fujikawa
Department of Intelligent Mechanical Engineering, Okayama University of Science, 1-1 Ridai-cho, Kita-ku, Okayama 700-0005, Japan
A wearable actuator needs to be flexible so as not to injure the human body. The purpose of our study is to develop a flexible and lightweight actuator which can be safe enough to be attached to the human body, and to apply it to a robot arm and rehabilitation device. New types of flexible pneumatic actuator that can be used even if the actuator is deformed by external force have been developed in our previous studies. In this paper, a robot arm using the flexible pneumatic cylinder that can realize a natural flowing movement with multi-motion such as bending, expanding, and contracting is described. The analytical model of the robot arm is proposed for attitude control. In addition, an inexpensive quasi-servo valve using the on/off control valve is utilized in the master-slave control system to improve the control performance. As a result, the usability of the proposed robot arm and the effectiveness of the attitude control method using the analytical model and the quasi-servo valve are confirmed.
-  M. Ishii, K. Yamamoto, and K. Hyodo, “Stand-Alone Wearable Power Assist Suit – Development and Availability –,” J. of Robotics and Mechatronics, Vol.17, No.5, pp. 575-583, 2005.
-  T. Noritsugu, M. Takaiwa, and D. Sasaki, “Development of Power Assist Wear Using Pneumatic Rubber Artificial Muscles,” J. of Robotics and Mechatronics, Vol.21, No.5, pp. 607-613, 2009.
-  H. Kobayashi, T. Shiban, and Y. Ishida, “Realization of All 7 Motions for the Upper Limb by a Muscle Suit,” J. of Robotics and Mechatronics, Vol.16, No.5, pp. 504-512, 2004.
-  Y. Nagata (Ed), “Soft Actuators – Forefront of Development –,” NTS Ltd., pp. 291-335, 2004.
-  T. Akagi and S. Dohta, “Development of McKibben Artificial Muscle with a Long Stroke Motion,” Trans. of JSME, Series C, Vol.73, No.735, pp. 2996-3002, 2007.
-  T. Akagi and S. Dohta, “Development of a Rodless Type Flexible Pneumatic Cylinder and Its Application,” Trans. of JSME, Series C, Vol.73, No.731, pp. 2108-2114, 2007.
-  F. Zhao, S. Dohta, and T. Akagi, “Development and Analysis of Small-Sized Quasi-Servo Valve for Flexible Bending Actuator,” Trans. of JSME, Series C, Vol.76, No.772, pp. 3665-3671, 2010.
This article is published under a Creative Commons Attribution-NoDerivatives 4.0 Internationa License.