75th Annual Meeting of the APS Division of Fluid Dynamics (November 20, 2022 — November 22, 2022)

V0039: A passive double pendulum walks in the wake of a cylinder

  • Adrian Carleton, University of Massachusetts, Amherst
  • Bridget Benner, University of Massachusetts, Amherst
  • Frank Sup, University of Massachusetts, Amherst
  • Yahya Modarres-Sadeghi, University of Massachusetts, Amherst
DOI: https://doi.org/10.1103/APS.DFD.2022.GFM.V0039

In a long-term project, we are designing a robot to provide assistance to patients with walking disabilities by manipulating the flow of water in an underwater treadmill to enable the patients to follow a desired walking trajectory. In this video, we show this concept using a double pendulum. A cylinder forced to rotate upstream the double pendulum controls the shedding frequency and strength of the vortices that interact with the double pendulum. These vortices then interact with a hydrofoil that is attached to the double pendulum and produce trajectories very similar to the human walking gait trajectories.

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