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Proceedings Paper

Smart structure active sonar echo cancellation using frequency-scheduled control
Author(s): Laurence R. Riddle; John J. Murray
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Paper Abstract

Practical applications of smart structure technology to active acoustic noise control demand high performance at low cost. Typically, performance increase achieved by reducing control system latency are expensive. Furthermore, sonar echo cancellation is concerned with a wide frequency range for which linear time-invariant (LTI) controllers provide inadequate performance, and no direct error measurement is available to drive adaptive controllers. Real-time estimators of the cancellation error have been proposed to enable the use of adaptive controllers, however this significantly increases the system cost. In this paper, we introduce a frequency scheduled control architecture for echo cancellation which achieves adaptive control performance at LTI control prices, by exploiting the narrow instantaneous bandwidth commonly associated with individual sonar pings.

Paper Details

Date Published: 16 June 1998
PDF: 10 pages
Proc. SPIE 3326, Smart Structures and Materials 1998: Industrial and Commercial Applications of Smart Structures Technologies, (16 June 1998); doi: 10.1117/12.310671
Show Author Affiliations
Laurence R. Riddle, Signal Systems Corp. (United States)
John J. Murray, Signal Systems Corp. (United States)


Published in SPIE Proceedings Vol. 3326:
Smart Structures and Materials 1998: Industrial and Commercial Applications of Smart Structures Technologies
Janet M. Sater, Editor(s)

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