Smart structure active sonar echo cancellation using frequency-scheduled control

Laurence R. Riddle; John J. Murray

doi:10.1117/12.310671

16 June 1998 Smart structure active sonar echo cancellation using frequency-scheduled control

Laurence R. Riddle, John J. Murray

Proceedings Volume 3326, Smart Structures and Materials 1998: Industrial and Commercial Applications of Smart Structures Technologies; (1998) https://doi.org/10.1117/12.310671
Event: 5th Annual International Symposium on Smart Structures and Materials, 1998, San Diego, CA, United States

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.

Citation Download Citation

Laurence R. Riddle and John J. Murray "Smart structure active sonar echo cancellation using frequency-scheduled control", Proc. SPIE 3326, Smart Structures and Materials 1998: Industrial and Commercial Applications of Smart Structures Technologies, (16 June 1998); https://doi.org/10.1117/12.310671

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