Archives of Acoustics, 39, 4, pp. 605-613, 2014

Control of Bending-Bending Coupled Vibrations of a Rotating Thin-Walled Composite Beam

Lublin University of Technology, Nadbystrzycka 36, 20-618 Lublin

Lublin University of Technology, Nadbystrzycka 36, 20-618 Lublin

Lublin University of Technology, Nadbystrzycka 36, 20-618 Lublin

The paper presents a study of a possible application of structure embedded piezoelectric actuators to enhance the performance of a rotating composite beam exhibiting the coupled flexural-flexural vibrations. The discussed transversal and lateral bending modal coupling results from the directional properties of the beam’s laminate and ply stacking distribution. The mathematical model of the beam is based on an assumption of cross-sectional non-deformability and it incorporates a number of non-classical effects. The final 1-D governing equations of an active composite beam include both orthotropic properties of the laminate and transversely isotropic properties of piezoelectric layers. The system’s control capabilities resulting from embedded Macro Fiber Composite piezoelectric actuators are represented by the boundary bending moment. To enhance the dynamic properties of the composite specimen under consideration a combination of linear proportional control strategies has been used. Comparison studies have been performed, including the impact on modal coupling magnitude and cross-over frequency shift.
Keywords: thin-walled beam, adaptive materials, feedback control, composite beam, coupled vibrations, structural tailoring.
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DOI: 10.2478/aoa-2014-0065