Immersive Wave Control Experiments Using Non-isotropic Sources: Laboratory Applications
OPEN ACCESS
Loading...
Author / Producer
Date
2020-12
Publication Type
Conference Paper
ETH Bibliography
yes
Citations
Altmetric
OPEN ACCESS
Data
Rights / License
Abstract
A physical experiment can be fully linked and immersed within a virtual (numerical) domain through the real-time exchange of boundary conditions between the experiment and the numerical simulation. Such immersive wave control experimentation relies on active sources deployed around a physical domain (e.g., a water tank) to change its boundary condition. However, in theory, the control algorithm requires sources with an isotropic radia tion pattern, while physical sources typically exhibit angle dependent radiation characteristics. This discrepancy can be overcome by a processing method carried out in the frequency-wavenumber (f-k) domain if the source radiation pattern is known. Here we show the measured radiation pattern of a custom-built Bender-mode X-spring (BMX) type piezoelectric source that will be used in under water acoustic immersive wave experimentation. We measure the half-space radiation pattern of the BMX source that is mounted at the center of a steel plate with a transversely deployed planar receiver surface. The acquired data is redatumed to that corresponding to receivers deployed along a semi-circle and the source at the origin. The BMX source shows a non-negligible radiation pattern with the highest energy at normal and decreasing power gradually to its perpendicular. The measured radiation pattern will be incorporated into the 3-D physical implementation of immersive wave experimentation.
Permanent link
Publication status
published
External links
Editor
Book title
Forum Acusticum
Journal / series
Volume
Pages / Article No.
2133 - 2138
Publisher
HAL archives-ouvertes
Event
e-Forum Acousticum 2020 (e-FA 2020)
Edition / version
Methods
Software
Geographic location
Date collected
Date created
Subject
Organisational unit
03953 - Robertsson, Johan / Robertsson, Johan
Notes
Conference lecture held on December 10, 2020. Due to the Coronavirus (COVID-19) the conference was conducted virtually.
Funding
694407 - MAchine for Time Reversal and Imersive wave eXperiments (EC)