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Proceedings Paper

Performance comparison of feedback and feedforward structural-acoustic control techniques
Author(s): Brian S. Bingham; Nesbitt W. Hagood; Mauro J. Atalla
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Paper Abstract

Active control architectures for broadband acoustic radiation reduction are compared both analytically and experimentally on a representative structure to quantify the capabilities and limitations of the proposed control methodologies. Specifically, three broad categories of control are compared: classical feedback (rate feedback), optimal feedback (Linear Quadratic Gaussian), and adaptive feedforward control (x-filtered Least Mean Square). A simple radiation model of the light fluid, structural-acoustic behavior of the composite panel is utilized to design the compensators and predict closed-loop performance. For each type of control, a single input, single output design is implemented on a composite panel with embedded active fiber composite piezoelectric actuators. Both the vibration and acoustic performance is recorded for each experiment under equivalent conditions to facilitate a generalizable comparison. Experimental results lead to generalized conclusions pertaining to the application of active structural-based control to improve the acoustic performance of complex structures.

Paper Details

Date Published: 9 June 1999
PDF: 13 pages
Proc. SPIE 3668, Smart Structures and Materials 1999: Smart Structures and Integrated Systems, (9 June 1999); doi: 10.1117/12.350702
Show Author Affiliations
Brian S. Bingham, Massachusetts Institute of Technology (United States)
Nesbitt W. Hagood, Massachusetts Institute of Technology (United States)
Mauro J. Atalla, Massachusetts Institute of Technology (United States)

Published in SPIE Proceedings Vol. 3668:
Smart Structures and Materials 1999: Smart Structures and Integrated Systems
Norman M. Wereley, Editor(s)

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