The control of flexible structure vibrations using a cantilevered adaptive truss

dc.contributor.authorWynn, Robert H.en
dc.contributor.committeechairRobertshaw, Harry H.en
dc.contributor.committeememberLeonard, Robert G.en
dc.contributor.committeememberReinholtz, Charles F.en
dc.contributor.committeememberWicks, Alfred L.en
dc.contributor.committeememberLindner, Douglasen
dc.contributor.departmentMechanical Engineeringen
dc.date.accessioned2014-03-14T21:21:28Zen
dc.date.adate2005-10-19en
dc.date.available2014-03-14T21:21:28Zen
dc.date.issued1990en
dc.date.rdate2005-10-19en
dc.date.sdate2005-10-19en
dc.description.abstractThis study presents analytical and experimental procedures and design tools for the control of flexible structure vibrations using a cantilevered adaptive truss. A specific six-actuator, octahedral-octahedral truss effects the control of different flexible structures. These structures could represent space structures or robotic manipulators or a variety of other flexible structures where unwanted structural vibration could reduce the performance of the system. Three of these structures; a slender beam, a single curved beam, and two curved beams are controlled both in simulation and with an experimental test article. The test article, comprised of the flexible structure, the adaptive truss, and the actuators shows excellent agreement between simulated and experimental responses to initial conditions in both open-loop and (LQR) closed-loop control. As a example of the ability of the truss to control the slender beam, a first mode simulated frequency of 3.11Hz (3.09Hz experimental) and damping ratio of 0.0044 (0.0044) are controlled to produce a 3.20Hz (3.14Hz) frequency and a damping ratio of 0.2876 (0.2746). This 6000% increase in damping without a significant change in the modal frequency shows the potential of the adaptive truss in vibration control. The agreement between simulated and experimental data shows the validity of the modeling and experimental procedures. From the information gained, conclusions are drawn about the uses of an adaptive truss in the control of flexible structure vibrations.en
dc.description.degreePh. D.en
dc.format.extentxi, 120 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-10192005-113253en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-10192005-113253/en
dc.identifier.urihttp://hdl.handle.net/10919/39949en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V856_1990.W966.pdfen
dc.relation.isformatofOCLC# 23716296en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V856 1990.W966en
dc.subject.lcshStructural analysis (Engineering)en
dc.subject.lcshTrussesen
dc.titleThe control of flexible structure vibrations using a cantilevered adaptive trussen
dc.typeDissertationen
dc.type.dcmitypeTexten
thesis.degree.disciplineMechanical Engineeringen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.leveldoctoralen
thesis.degree.namePh. D.en

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