Open Access

ARTICLE

Active Control of a Reduced Model of a Smart Structure

N. Ghareeb¹, R. Schmidt¹

1 RWTH Aachen University of Technology, Aachen, Germany.

Structural Longevity 2013, 10(3), 177-199. https://doi.org/10.3970/sl.2013.010.177

Abstract

Control of vibration plays an important role in the performance of mechanical systems. Moreover, the advances in active materials have made it possible to integrate sensing, actuation and control of unwanted vibration in the design of the structure. In this work, a linear control system based on the Lyapunov stability theorem is used to attenuate the vibration of a cantilevered smart beam excited by its first eigenmode. An optimal finite element (FE) model of the smart beam is created with the help of experimental data. This model is then reduced to a super element (SE) model containing a finite number of degrees of freedom (DOF). The damping characteristics are investigated and damping coefficients are calculated and inserted into the model. The controller is applied directly to the SE model and to the extracted state-space (SS) representation of the same structure. Finally, results are presented and compared.

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Keywords

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