Active transmission and reflection coefficients for the control of flexural waves in beams

Rafael de la Guardia Gonzalez; Felipe Orduna Bustamante

doi:10.1117/12.388803

19 June 2000 Active transmission and reflection coefficients for the control of flexural waves in beams

Rafael de la Guardia Gonzalez, Felipe Orduna Bustamante

Proceedings Volume 3984, Smart Structures and Materials 2000: Mathematics and Control in Smart Structures; (2000) https://doi.org/10.1117/12.388803
Event: SPIE's 7th Annual International Symposium on Smart Structures and Materials, 2000, Newport Beach, CA, United States

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.

Citation Download Citation

Rafael de la Guardia Gonzalez and Felipe Orduna Bustamante "Active transmission and reflection coefficients for the control of flexural waves in beams", Proc. SPIE 3984, Smart Structures and Materials 2000: Mathematics and Control in Smart Structures, (19 June 2000); https://doi.org/10.1117/12.388803

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