Variable impedance actuators: A review

B. Vanderborght, A. Albu-Schaeffer, A. Bicchi, E. Burdet, D. G. Caldwell, R. Carloni, M. Catalano, O. Eiberger, W. Friedl, G. Ganesh, M. Garabini, M. Grebenstein, G. Grioli, S. Haddadin, H. Hoppner, A. Jafari, M. Laffranchi, D. Lefeber, F. Petit, S. StramigioliN. Tsagarakis, M. Van Damme, R. Van Ham, L. C. Visser, S. Wolf

Research output: Contribution to journalArticlepeer-review

844 Scopus citations

Abstract

Variable Impedance Actuators (VIA) have received increasing attention in recent years as many novel applications involving interactions with an unknown and dynamic environment including humans require actuators with dynamics that are not well-achieved by classical stiff actuators. This paper presents an overview of the different VIAs developed and proposes a classification based on the principles through which the variable stiffness and damping are achieved. The main classes are active impedance by control, inherent compliance and damping actuators, inertial actuators, and combinations of them, which are then further divided into subclasses. This classification allows for designers of new devices to orientate and take inspiration and users of VIA's to be guided in the design and implementation process for their targeted application.

Original languageEnglish
Pages (from-to)1601-1614
Number of pages14
JournalRobotics and Autonomous Systems
Volume61
Issue number12
DOIs
StatePublished - Dec 2013
Externally publishedYes

Keywords

  • Soft robotics
  • Variable impedance actuators

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