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Real-Time Immersion of Physical Experiments in Virtual Wave-Physics Domains

Theodor S. Becker1,*, Nele Börsing1, Thomas Haag1, Christoph Bärlocher1, Carly M. Donahue2, Andrew Curtis3, Johan O. A. Robertsson1, and Dirk-Jan van Manen1

  • 1Institute of Geophysics, ETH Zürich, 8092 Zürich, Switzerland
  • 2Earth and Environmental Sciences, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
  • 3School of GeoSciences, University of Edinburgh, Edinburgh EH9 3FE, United Kingdom

  • *theodor.becker@erdw.ethz.ch
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Phys. Rev. Applied 13, 064061 – Published 25 June, 2020

DOI: https://doi.org/10.1103/PhysRevApplied.13.064061

Abstract

We immerse a two-dimensional physical wave-propagation experiment in a virtual (simulated) environment in real time. This enables broadband hybrid wave experimentation in physical media that may be governed by unknown physics, embedded seamlessly within virtual media with either modeled or measured physics. Using the theory of immersive boundary conditions and a recently presented control system [Becker et al., Immersive Wave Propagation Experimentation: Physical Implementation and One-Dimensional Acoustic Results, Phys. Rev. X 8, 031011 (2018)], we convert a circular two-dimensional acoustic waveguide into a larger physicovirtual square waveguide. Real-time wave-field extrapolation allows waves to propagate seamlessly between physical and virtual media, producing correct wave-field interactions between them, including nonlinear effects. We show that the laboratory can physically measure the response of nonphysical energy-gain materials in real time. The physicovirtual laboratory thus allows previously inaccessible wave phenomena to be investigated experimentally and constitutes an alternative approach for wave-physics investigations by connecting experimental and numerical approaches.

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Phys. Rev. Applied 13, 064061– Published 25 June, 2020
  • Received 4 February 2020
  • Revised 29 April 2020
  • Accepted 11 May 2020
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