Dynamics of tensegrity robots with negative stiffness elements

Altay Zhakatayev, Banu Abdikadirova, Shamil Sarmonov, Huseyin Atakan Varol

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Tensegrity structures have unique features such as low mass to payload ratio, strength, and robustness. Therefore, they present great potential in robotics, aerospace, and civil engineering. The dynamics of tensegrity robots is highly nonlinear and constrained. As a result, their modeling, simulation, state estimation, and control are non-trivial. Strings in tensegrity structures are usually modeled as linear springs. Utilization of nonlinear elastic/damping elements in tensegrities would further enrich their dynamics and endow them with additional properties, such as multiple equilibrium configurations. In this paper, our preliminary work on the dynamics of actuated tensegrities with strings containing nonlinear elastic and/or damping elements is presented. At first, the formulation of tensegrity dynamics with general nonlinear elastic/damping elements is explored. Later dynamics of tensegrities with negative stiffness honeycombs incorporated into strings are considered. Simulations are performed on three tensegrity systems: two-bar, three-bar, and six-bar structures. Results demonstrate that negative stiffness honeycombs result in nonlinear steady-state response to constant external force, reduced force magnitudes in strings and bars, and increased range of motion.

Original languageEnglish
Pages (from-to)187114-187125
Number of pages12
JournalIEEE Access
Volume8
DOIs
Publication statusPublished - 2020

Keywords

  • Negative stiffness beam
  • Nonlinear damping element
  • Nonlinear stiffness element
  • Tensegrity
  • Tensegrity dynamics with negative stiffness honeycomb

ASJC Scopus subject areas

  • General Computer Science
  • General Materials Science
  • General Engineering

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