Reduced-order modeling of soft robots

PLoS One. 2018 Feb 22;13(2):e0192052. doi: 10.1371/journal.pone.0192052. eCollection 2018.

Abstract

We present a general strategy for the modeling and simulation-based control of soft robots. Although the presented methodology is completely general, we restrict ourselves to the analysis of a model robot made of hyperelastic materials and actuated by cables or tendons. To comply with the stringent real-time constraints imposed by control algorithms, a reduced-order modeling strategy is proposed that allows to minimize the amount of online CPU cost. Instead, an offline training procedure is proposed that allows to determine a sort of response surface that characterizes the response of the robot. Contrarily to existing strategies, the proposed methodology allows for a fully non-linear modeling of the soft material in a hyperelastic setting as well as a fully non-linear kinematic description of the movement without any restriction nor simplifying assumption. Examples of different configurations of the robot were analyzed that show the appeal of the method.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Algorithms
  • Models, Theoretical*
  • Robotics*

Grants and funding

This work was supported by Spanish Ministry of Economy and Competitiveness grant # CICYT DPI2014-51844-C2-1-R (recipient: E.C.) and Spanish Ministry of Economy and Competitiveness grant # DPI2015-72365-EXP (recipient: E.C.).