Active vibration control of beams and cylindrical structures using piezoelectric patches

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Date

2014

Author

Gençoğlu, Caner

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Airborne structures are required to be lightweight in today's designs. However this lowers the overall stiffness of the structure and causes low frequency vibration problems for which passive vibration control techniques are inadequate. Active vibration control using piezoelectric patches is a promising technology to solve vibration problems of aerospace structures. Many studies were done on beam and plate geometries, however studies on cylinder geometry which is used extensively as engineering structure, is relatively rare. In this study, first a cantilever beam is studied to verify the analysis, modeling and control concepts to be used in the cylinder structure since cantilever beam has simpler dynamics. Finite element model of the beam with piezoelectric patch is generated. Control simulations are done on the mathematical model of the cantilever beam derived from the finite element model. Experimental works are carried out on the beam to verify the controller designed in the simulation stage. The second structure studied is a hollow cylinder with piezoelectric patch actuator and sensor pair. This study is an extension of the beam study with the addition of determining the optimal piezoelectric patch placement. Optimal location of piezoelectric patch actuator is determined based on a method that uses the controllability Gramian of the system with piezoelectric patch for the target modes to be controlled. After patch placement control simulations are made to design the controller and verify the placement of actuator. Experimental works are also made over the cylinder to verify the designed controller and the patch placement.

Subject Keywords

Girders., Vibration., Piezoelectric materials., Cylindrical structures.

URI

http://etd.lib.metu.edu.tr/upload/12616855/index.pdf
https://hdl.handle.net/11511/23311

Collections

Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

C. Gençoğlu, “Active vibration control of beams and cylindrical structures using piezoelectric patches,” M.S. - Master of Science, Middle East Technical University, 2014.