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Experimental study of the acoustic navigation of a helicopter by its noise radiation

Experimental study of the acoustic navigation of a helicopter by its noise radiation Abstract Results of experimental measurements of the coordinates and trajectories of an MI-8 helicopter flight are presented for various types of maneuvers and the landing approach. The current coordinates are measured in real time by acoustic differential navigation methods using the noise radiation of a helicopter. It is shown that, when a measuring base with a microphone spacing of 2 m or less is used, the spatial correlation coefficient for the signals in the frequency band from 200 to 5000 Hz approaches unity. This makes it possible to estimate the position of the helicopter with rms errors less than 0.4 m at all stages of flight and at the landing approach. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Acoustical Physics Springer Journals

Experimental study of the acoustic navigation of a helicopter by its noise radiation

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References (9)

Publisher
Springer Journals
Copyright
2000 MAIK "Nauka/Interperiodica"
ISSN
1063-7710
eISSN
1562-6865
DOI
10.1134/1.1326718
Publisher site
See Article on Publisher Site

Abstract

Abstract Results of experimental measurements of the coordinates and trajectories of an MI-8 helicopter flight are presented for various types of maneuvers and the landing approach. The current coordinates are measured in real time by acoustic differential navigation methods using the noise radiation of a helicopter. It is shown that, when a measuring base with a microphone spacing of 2 m or less is used, the spatial correlation coefficient for the signals in the frequency band from 200 to 5000 Hz approaches unity. This makes it possible to estimate the position of the helicopter with rms errors less than 0.4 m at all stages of flight and at the landing approach.

Journal

Acoustical PhysicsSpringer Journals

Published: Nov 1, 2000

Keywords: Acoustics

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