Performance comparison of feedback and feedforward structural-acoustic control techniques

Brian S. Bingham; Nesbitt W. Hagood; Mauro J. Atalla

doi:10.1117/12.350702

9 June 1999 Performance comparison of feedback and feedforward structural-acoustic control techniques

Brian S. Bingham, Nesbitt W. Hagood, Mauro J. Atalla

Proceedings Volume 3668, Smart Structures and Materials 1999: Smart Structures and Integrated Systems; (1999) https://doi.org/10.1117/12.350702
Event: 1999 Symposium on Smart Structures and Materials, 1999, Newport Beach, CA, United States

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.

Citation Download Citation

Brian S. Bingham, Nesbitt W. Hagood, and Mauro J. Atalla "Performance comparison of feedback and feedforward structural-acoustic control techniques", Proc. SPIE 3668, Smart Structures and Materials 1999: Smart Structures and Integrated Systems, (9 June 1999); https://doi.org/10.1117/12.350702

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