Experimental verification and development of structural identification techniques on a grid

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dc.contributor.authorKahn, Steven Phillipen
dc.contributor.committeechairNorris, Mark A.en
dc.contributor.committeememberMook, Dean T.en
dc.contributor.committeememberMeirovitch, Leonarden
dc.contributor.departmentEngineering Mechanicsen
dc.date.accessioned2014-03-14T21:31:05Zen
dc.date.adate2009-03-12en
dc.date.available2014-03-14T21:31:05Zen
dc.date.issued1990-04-05en
dc.date.rdate2009-03-12en
dc.date.sdate2009-03-12en
dc.description.abstractThe work that is reported herein deals with system identification methods for large flexible structures. Proposed space missions for the future include the deployment of large flexible structures, e.g., NASA's proposed space station. These structures must be controlled to maneuver the structure to desired locations and to suppress unwanted vibration. Before controlling any structure, it is necessary to have an accurate model which may include accurate estimates of the structure's natural frequencies and mode shapes. System identification is an important process that precludes system control. Precision structures such as those proposed for the Space Based Laser or the Aerospace Plane require high performance control systems which will require robust, computationally efficient system identification algorithms. This work attempts to experimentally verify, develop, and compare existing identification algorithms to determine their properties and improve their efficiency towards potential applicability in a space environment. To this end, we consider the Temporal Correlation Method and the Eigensystem Realization Algorithm. The algorithms are implemented on the Astronautics Laboratory Grid structure, and the results of the algorithms are compared in the presence of damping, noise, and residual modes. In addition, the Temporal Correlation Method is shown to be a constrained version of the Eigensystem Realization Algorithm for cases of light damping.en
dc.description.degreeMaster of Scienceen
dc.format.extentviii, 81 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-03122009-040526en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-03122009-040526/en
dc.identifier.urihttp://hdl.handle.net/10919/41453en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V855_1990.K346.pdfen
dc.relation.isformatofOCLC# 22403409en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V855 1990.K346en
dc.subject.lcshSpace frame structures -- Researchen
dc.titleExperimental verification and development of structural identification techniques on a griden
dc.typeThesisen
dc.type.dcmitypeTexten
thesis.degree.disciplineEngineering Mechanicsen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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