Active Control of Smart Panel Using Triangular Actuators

Paper number

IAC-06-C2.5.07

Author

Mrs. Yohko Aoki, University of Southampton, United Kingdom

Coauthor

Prof. Stephan J. Elliot, University of Southampton, United Kingdom

Coauthor

Dr. Paolo Gardonio, University of Southampton, United Kingdom

Year

2006

Abstract

Keyword
Smart structure, active structural acoustic control, smart panel

This study focuses on a theoretical analysis and experimental results on the active structural acoustic control of a new smart panel with sixteen triangularly shaped piezoelectric patch actuators, having their base edges evenly distributed along the perimeter of the panel, and velocity sensors positioned at the vertices opposite the base edges. 

The control systems are arranged to generate active damping which reduces the response and sound radiation of the panel in the lightly damped and well separated low frequency resonances. 

In particular the new control system can be seen as a set of sixteen “active wedges” which absorb energy from the incident flexural waves to the borders of the panel so that the panel could be considered anechoic. Control effectiveness and stability of MIMO decentralized or SISO direct velocity feedback control architectures have been analyzed.

Theoretical analysis shows that triangular shape of the actuator produces a transverse point forces at the tip where the velocity error signal is measured, which guarantees a good collocation, and thus control stability. This study shows that the new arrangement with triangularly shaped actuators can achieve better control performance of a corresponding system using square actuators. 

Abstract document

IAC-06-C2.5.07.pdf

Manuscript document

IAC-06-C2.5.07.pdf (🔒 authorized access only).

To get the manuscript, please contact IAF Secretariat.