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A new biarticular actuator design facilitates control of leg function in BioBiped3

Sharbafi, M. A. and Rode, C. and Kurowski, Stefan and Scholz, Dorian and Möckel, R. and Radkhah, Katayon and Zhao, G. and Rashty, A.M. and Stryk, Oskar von and Seyfarth, A. (2016):
A new biarticular actuator design facilitates control of leg function in BioBiped3.
In: Bioinspiration & Biomimetics, pp. 046003, 11, (4), DOI: 10.1088/1748-3190/11/4/046003,
[Online-Edition: http://iopscience.iop.org/article/10.1088/1748-3190/11/4/046...],
[Article]

Abstract

Bioinspired legged locomotion comprises different aspects, such as (i) benefiting from reduced complexity control approaches as observed in humans/animals, (ii) combining embodiment with the controllers and (iii) reflecting neural control mechanisms. One of the most important lessons learned from nature is the significant role of compliance in simplifying control, enhancing energy efficiency and robustness against perturbations for legged locomotion. In this research, we investigate how body morphology in combination with actuator design may facilitate motor control of leg function. Inspired by the human leg muscular system, we show that biarticular muscles have a key role in balancing the upper body, joint coordination and swing leg control. Appropriate adjustment of biarticular spring rest length and stiffness can simplify the control and also reduce energy consumption. In order to test these findings, the BioBiped3 robot was developed as a new version of BioBiped series of biologically inspired, compliant musculoskeletal robots. In this robot, three-segmented legs actuated by mono- and biarticular series elastic actuators mimic the nine major human leg muscle groups. With the new biarticular actuators in BioBiped3, novel simplified control concepts for postural balance and for joint coordination in rebounding movements (drop jumps) were demonstrated and approved.

Item Type: Article
Erschienen: 2016
Creators: Sharbafi, M. A. and Rode, C. and Kurowski, Stefan and Scholz, Dorian and Möckel, R. and Radkhah, Katayon and Zhao, G. and Rashty, A.M. and Stryk, Oskar von and Seyfarth, A.
Title: A new biarticular actuator design facilitates control of leg function in BioBiped3
Language: English
Abstract:

Bioinspired legged locomotion comprises different aspects, such as (i) benefiting from reduced complexity control approaches as observed in humans/animals, (ii) combining embodiment with the controllers and (iii) reflecting neural control mechanisms. One of the most important lessons learned from nature is the significant role of compliance in simplifying control, enhancing energy efficiency and robustness against perturbations for legged locomotion. In this research, we investigate how body morphology in combination with actuator design may facilitate motor control of leg function. Inspired by the human leg muscular system, we show that biarticular muscles have a key role in balancing the upper body, joint coordination and swing leg control. Appropriate adjustment of biarticular spring rest length and stiffness can simplify the control and also reduce energy consumption. In order to test these findings, the BioBiped3 robot was developed as a new version of BioBiped series of biologically inspired, compliant musculoskeletal robots. In this robot, three-segmented legs actuated by mono- and biarticular series elastic actuators mimic the nine major human leg muscle groups. With the new biarticular actuators in BioBiped3, novel simplified control concepts for postural balance and for joint coordination in rebounding movements (drop jumps) were demonstrated and approved.

Journal or Publication Title: Bioinspiration & Biomimetics
Volume: 11
Number: 4
Divisions: 20 Department of Computer Science
20 Department of Computer Science > Simulation, Systems Optimization and Robotics Group
Date Deposited: 29 Nov 2018 08:11
DOI: 10.1088/1748-3190/11/4/046003
Official URL: http://iopscience.iop.org/article/10.1088/1748-3190/11/4/046...
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