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Proceedings Paper

Active transmission and reflection coefficients for the control of flexural waves in beams
Author(s): Rafael de la Guardia Gonzalez; Felipe Orduna Bustamante
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Paper Abstract

This paper presents the theoretical development and experimental results of an active control system used to create a variable impedance termination on a Timoshenko beam that allows for the arbitrary setting of the reflection and/or transmission coefficients at the active boundary of the beam. A realizable feedforward control configuration with one input and two outputs is derived where a cost function constructed by filtering the response from four closely spaced sensors is minimized. The effectiveness of the system was evaluated experimentally on an aluminum beam with four patches of PVDF piezofilm used as sensors and two pairs of PZT piezoceramic patches used as bending moment actuators.

Paper Details

Date Published: 19 June 2000
PDF: 10 pages
Proc. SPIE 3984, Smart Structures and Materials 2000: Mathematics and Control in Smart Structures, (19 June 2000); doi: 10.1117/12.388803
Show Author Affiliations
Rafael de la Guardia Gonzalez, Univ. Nacional Autonoma de Mexico (Mexico)
Felipe Orduna Bustamante, Univ. Nacional Autonoma de Mexico (Mexico)

Published in SPIE Proceedings Vol. 3984:
Smart Structures and Materials 2000: Mathematics and Control in Smart Structures
Vasundara V. Varadan, Editor(s)

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