著者

岡崎 安直 山本 正樹 小松 真弓 津坂 優子 足達 勇治

出版者

一般社団法人 日本ロボット学会

雑誌

日本ロボット学会誌 (ISSN:02891824)

巻号頁・発行日

vol.28, no.3, pp.302-310, 2010 (Released:2012-01-25)

参考文献数

12

被引用文献数

10 15

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Robotic systems intended for domestic housekeeping or elderly care tasks will have interaction with humans and therefore demand an intrinsically safe design. Conventional robotic systems are driven by heavy, high power and high stiffness electric motors, making them unsafe for human coexistence. To overcome this problem, we have developed a robotic arm system using pneumatic muscle actuators, which is intrinsically safe given its low weight and pliant structure. In this paper we present the design of the robot arm and associated control system, showing that the robot has positioning and force control accuracy sufficient for daily domestic tasks.

著者

津坂 優子 ダーラリベラ ファビオ 岡崎 安直 山本 正樹 横小路 泰義

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集 (ISSN:21879761)

巻号頁・発行日

vol.83, no.852, pp.17-00058-17-00058, 2017 (Released:2017-08-25)

参考文献数

18

被引用文献数

4

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This paper proposes a method for assisting standing-up by a robot that utilizes patients' own power to their extent while allowing them to stand up easily. Analyzing the skills of physiotherapists, we extracted two skills that assist patients in standing up by themselves, (1) promoting a forward-bending posture by making their upper body close to a single rigid body, through stretching their back and anteverting their pelvis, and (2) providing minimal balance so the patient does not fall down. In order to implement these skills, we propose (1) a body holder to hold the patient's upper body which reinforces a natural forward-bending posture, and (2) a horizontal position and vertical force assist control system which guides position control in the horizontal direction and assists with exerting force through force control in the vertical direction. We also propose a velocity-switching method as a simplified implementation of the physiotherapist skill. We built a prototype assist robot, which is compact and movable, aiming at the commercialization of standing-up motion assist robots. We implemented the skills of physiotherapists to this prototype robot and confirmed the validity of these skills. We detail the relationship among robot's speed, forces acting on the robot's user and muscular activation. From the results of this analysis we derive indications on the speed appropriate for assisting the sit-to-stand movement.

著者

木原 康之 鈴木 達也 菅野 貴皓 深尾 隆則 津坂 優子 札場 勇大 佐藤 太一 横小路 泰義

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集C編 (ISSN:18848354)

巻号頁・発行日

vol.79, no.803, pp.2362-2372, 2013 (Released:2013-07-25)

参考文献数

13

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We have already proposed the method to transfer human skill to a robot through direct teaching. By using the method, we can automatically extract human skill including sensory feedback to adapt to environmental variation. However, we have not discussed what trajectory is robust against environmental variation. In this paper, we discuss the robustness condition of robot trajectories against environmental variation and how to derive the robust trajectory. We propose a method to determine whether a trajectory is robust or not. The method considers the probability of the environment variation uses the parameter space expression of trajectory in order to derive the robustness condition. We confirm the effectiveness of the proposed method through a case study on a typical assembly task, peg-in-hole.