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Hybrid modelling for echo location and surface characterization
Author(s) -
de Cogan D.,
Morton M.,
Peel D.,
Sant V.
Publication year - 2001
Publication title -
international journal of numerical modelling: electronic networks, devices and fields
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.249
H-Index - 30
eISSN - 1099-1204
pISSN - 0894-3370
DOI - 10.1002/jnm.403
Subject(s) - interfacing , echo (communications protocol) , ranging , rotor (electric) , scattering , computer science , acoustics , surface (topology) , ray tracing (physics) , characterization (materials science) , tracing , noise (video) , simple (philosophy) , physics , engineering , optics , mechanical engineering , artificial intelligence , telecommunications , mathematics , computer network , philosophy , geometry , epistemology , computer hardware , image (mathematics) , operating system
The scattering of sound from surfaces by rotating sources such as the tips of helicopter rotor blades can be used as a method of locating and ranging obstructions which may represent a physical danger to the craft. Modelling such systems presents some difficulties but these can be overcome using a combination of TLM and phase‐coherent ray‐tracing. This paper describes the hybrid approach, particularly, the techniques for interfacing. The application to the specific problem of the scattering of rotor‐tip noise from realistic targets involved the use of a simple PML and surface‐conforming boundaries. Copyright © 2001 John Wiley & Sons, Ltd.