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Proceedings Paper

Development of active structural control method for vibration and acoustic radiation reduction
Author(s): Kwaku O. Prakah-Asante; Kevin C. Craig
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Paper Abstract

Vibrations are detrimental to the performance and durability of flexible structural components used in engineering systems. Structural vibrations can cause pressure perturbations in air, especially when the structural modes are well coupled with the sound field, leading to undesirable radiated noise. Methods for vibration and acoustic radiation minimization in flexible plate structures using piezoelectric materials as sensors and actuators are addressed in this paper. Development of effective compensation techniques to enable the active structure to maintain its structural reliability, requires understanding the vibrational and acoustic response characteristics of the active structure. Based on such response characteristics, a dual active control scheme is developed for vibration and acoustic radiation reduction. The dual scheme is based on a modified form of the filtered-x LMS algorithm. A fuzzy inference adaptation method is used to regulate the learning rate and control output of the LMS adaptive algorithm, depending on the levels of vibrations or noise present. Experimental results obtained from the real-time implementation of a vibration control scheme, and the dual active scheme on a typical active plate structure is presented.

Paper Details

Date Published: 22 May 1995
PDF: 15 pages
Proc. SPIE 2441, Smart Structures and Materials 1995: Smart Materials, (22 May 1995); doi: 10.1117/12.209810
Show Author Affiliations
Kwaku O. Prakah-Asante, Rensselaer Polytechnic Institute (United States)
Kevin C. Craig, Rensselaer Polytechnic Institute (United States)

Published in SPIE Proceedings Vol. 2441:
Smart Structures and Materials 1995: Smart Materials
A. Peter Jardine, Editor(s)

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