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Electric-Pneumatic Actuator: A New Muscle for Locomotion

Ahmad Sharbafi, Maziar ; Shin, Hirofumi ; Zhao, Guoping ; Hosoda, Koh ; Seyfarth, Andre (2017):
Electric-Pneumatic Actuator: A New Muscle for Locomotion.
In: Actuators, 6 (4), MDPI, ISSN 2076-0825,

Copyright Information: CC BY 4.0 International - Creative Commons, Attribution.

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Item Type: Article
Origin: Secondary publication via sponsored Golden Open Access
Title: Electric-Pneumatic Actuator: A New Muscle for Locomotion
Language: English

A better understanding of how actuator design supports locomotor function may help develop novel and more functional powered assistive devices or robotic legged systems. Legged robots comprise passive parts (e.g., segments, joints and connections) which are moved in a coordinated manner by actuators. In this study, we propose a novel concept of a hybrid electric-pneumatic actuator (EPA) as an enhanced variable impedance actuator (VIA). EPA is consisted of a pneumatic artificial muscle (PAM) and an electric motor (EM). In contrast to other VIAs, the pneumatic artificial muscle (PAM) within the EPA provides not only adaptable compliance, but also an additional powerful actuator with muscle-like properties, which can be arranged in different combinations (e.g., in series or parallel) to the EM. The novel hybrid actuator shares the advantages of both integrated actuator types combining precise control of EM with compliant energy storage of PAM, which are required for efficient and adjustable locomotion. Experimental and simulation results based on the new dynamic model of PAM support the hypothesis that combination of the two actuators can improve efficiency (energy and peak power) and performance, while does not increase control complexity and weight, considerably. Finally, the experiments on EPA adapted bipedal robot (knee joint of the BioBiped3 robot) show improved efficiency of the actuator at different frequencies.

Journal or Publication Title: Actuators
Volume of the journal: 6
Issue Number: 4
Place of Publication: Darmstadt
Publisher: MDPI
Classification DDC: 700 Künste und Unterhaltung > 796 Sport
Divisions: 03 Department of Human Sciences > Institut für Sportwissenschaft
Date Deposited: 01 Nov 2017 12:00
Last Modified: 13 Dec 2022 10:23
Corresponding Links:
URN: urn:nbn:de:tuda-tuprints-69282
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/6928
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