Design, testing and control of a magnetorheological actuator for assistive knee braces
- Тип контента: Научная статья
- Номер документа: 3587
- Название документа: Design, testing and control of a magnetorheological actuator for assistive knee braces
- Номер (DOI, IBSN, Патент): 10.1088/0964-1726/19/3/035029
- Изобретатель/автор: Wei-Hsin Liao, J. Z. Chen
- Правопреемник/учебное заведение: Department of Mechanical and Automation Engineering, The Chinese University of Hong Kong
- Дата публикации документа: 2010-02-11
- Страна опубликовавшая документ: Китай
- Язык документа: Английский
- Наименование изделия: Не заполнено
- Источник: http://iopscience.iop.org/0964-1726/19/3/035029
- Вложения: Нет
- Аналитик: Helix
This paper is aimed at developing a smart actuator for assistive knee braces to provide assistance to disabled or elderly people with mobility problems. A magnetorheological (MR) actuator is developed to be used in assistive knee braces to provide controllable torque. The MR actuator can work as a brake or a clutch. When active torque is needed, the DC motor works and the MR actuator functions as a clutch to transfer the torque generated by the motor to the leg; when passive torque is desired, the DC motor is turned off and the MR actuator functions as a brake to provide controllable passive torque. The prototype of the developed MR actuator is fabricated and experiments are carried out to investigate the characteristics of the MR actuator. The results show that the MR actuator is able to provide sufficient torque needed for normal human activities. Adaptive control is proposed for controlling the MR actuator. Anti-windup strategy is used to achieve better control performance. Experiments on the MR actuator under control are also performed to study the torque tracking ability of the system.
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