4.7 Article

Impedance Compensation of SUBAR for Back-Drivable Force-Mode Actuation

期刊

IEEE TRANSACTIONS ON ROBOTICS
卷 25, 期 3, 页码 512-521

出版社

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TRO.2009.2019786

关键词

Exoskeleton; force-mode actuation; human-robot interaction; mechanical impedance

类别

资金

  1. Ministry of Knowledge Economy of Korea
  2. National Science Foundation [CMMI-0800501]
  3. Korea Evaluation Institute of Industrial Technology (KEIT) [9-2, 10030832] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)

向作者/读者索取更多资源

The Sogang University biomedical assistive robot (SUBAR), which is an advanced version of the exoskeleton for patients and the old by Songang (EXPOS) is a wearable robot developed to assist physically impaired people. It provides a person with assistive forces controlled by human intentions. If a standard geared dc motor is applied, however, the control efforts will be used mainly to overcome the resistive forces caused by the friction, the damping, and the inertia in actuators. In this paper, such undesired properties are rejected by applying a flexible transmission. With the proposed method, it is intended that an actuator exhibits zero impedance without friction while generating the desired torques precisely. Since the actuation system of SUBAR has a large model variation due to human-robot interaction, a control algorithm for the flexible transmission is designed based on a robust control method. In this paper, the mechanical design of SUBAR, including the flexible transmission and its associated control algorithm, are presented. They are also verified by experiments.

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