Aircraft flight parameter estimation using acoustical Lloyd´s mirror effect

Author

Lo, Kam W. ; Perry, Stuart W. ; Ferguson, Brian G.

Author_Institution

Defence Sci. & Technol. Organ., Pyrmont, NSW, Australia

Volume

38

Issue

1

fYear

2002

fDate

1/1/2002 12:00:00 AM

Firstpage

137

Lastpage

151

Abstract

A model is developed for the acoustical Lloyd´s mirror effect observed in the output time-frequency distribution of a microphone located near the ground during the transit of a jet aircraft. The feasibility of using this effect for flight parameter estimation is assessed by a simple Cramer-Rao lower bound analysis. The nonlinear least-squares method and the generalized Hough transform method are formulated for flight parameter estimation. The performances of both methods are evaluated and compared using real acoustic data

Keywords

Hough transforms; acoustic field; acoustic wave interference; aircraft; least squares approximations; observability; parameter estimation; time-frequency analysis; Cramer-Rao lower bound analysis; acoustical Lloyd´s mirror effect; aircraft flight parameter estimation; background correction; generalized Hough transform; interference fringes; jet aircraft transit; microphone; nonlinear least-squares method; observability; output time-frequency distribution; sound field; temporal variations; Acoustic propagation; Acoustic sensors; Aircraft; Australia; Impedance; Interference; Microphones; Mirrors; Parameter estimation; Time frequency analysis;

fLanguage

English

Journal_Title

Aerospace and Electronic Systems, IEEE Transactions on

Publisher

ieee

ISSN

0018-9251

Type

jour

DOI

10.1109/7.993235

Filename

993235