Integrated structural design, vibration control, and aeroelastic tailoring by multiobjective optimization

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dc.contributor.authorCanfield, Robert A.en
dc.contributor.committeechairMeirovitch, Leonarden
dc.contributor.committeememberBaumann, William T.en
dc.contributor.committeememberLibrescu, Liviuen
dc.contributor.committeememberHenneke, Edmund G. IIen
dc.contributor.committeememberHendricks, Scott L.en
dc.contributor.departmentEngineering Mechanicsen
dc.date.accessioned2014-03-14T21:16:32Zen
dc.date.adate2008-07-28en
dc.date.available2014-03-14T21:16:32Zen
dc.date.issued1992-12-07en
dc.date.rdate2008-07-28en
dc.date.sdate2008-07-28en
dc.description.abstractThe integrated design of a structure and its control system was treated as a multiobjective optimization problem. Structural mass, a quadratic performance index, and the flutter speed constituted the vector objective function. The closed-loop performance index was taken as the time integral of the Hamiltonian. Constraints on natural frequencies and aeroelastic damping were also considered. Derivatives of the objective and constraint functions with respect to structural and control design variables were derived for a finite element beam model of the structure and constant feedback gains determined by Independent Modal Space Control. Pareto optimal designs generated for a simple beam and a tetrahedral truss demonstrated the benefit of solving the integrated structural and control optimization problem. The use of quasi-steady aerodynamic strip theory with a thin-wall box beam model showed that the integrated design for a high aspect ratio, unswept, straight, isotropic wing can be separable. Finally, an efficient modal solution of the flutter equation facilitated the aeroelastic tailoring of a low aspect ratio, forward swept, composite plate wing model.en
dc.description.degreePh. D.en
dc.format.extentvii, 165 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-07282008-134827en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-07282008-134827/en
dc.identifier.urihttp://hdl.handle.net/10919/38912en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V856_1992.C364.pdfen
dc.relation.isformatofOCLC# 27864509en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V856 1992.C364en
dc.subject.lcshStructural designen
dc.subject.lcshStructural optimizationen
dc.subject.lcshVibration -- Controlen
dc.titleIntegrated structural design, vibration control, and aeroelastic tailoring by multiobjective optimizationen
dc.typeDissertationen
dc.type.dcmitypeTexten
thesis.degree.disciplineEngineering Mechanicsen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.leveldoctoralen
thesis.degree.namePh. D.en

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