Time average feedforward control techniques for time varying systems

dc.contributor.authorLane, Stevenen
dc.contributor.committeechairBurdisso, Ricardo A.en
dc.contributor.committeememberThomas, Russell H.en
dc.contributor.committeememberLeonard, Robert G.en
dc.contributor.departmentMechanical Engineeringen
dc.date.accessioned2014-03-14T21:37:02Zen
dc.date.adate2009-06-08en
dc.date.available2014-03-14T21:37:02Zen
dc.date.issued1994-05-05en
dc.date.rdate2009-06-08en
dc.date.sdate2009-06-08en
dc.description.abstractAdaptive FeedforWard algorithms have been successfully applied in the active control of sound and vibrations~ Current approaches, such as the Filtered-X Least Mean Square algorithm, are limited in adaptability and applicability by the computationally intensive system identification process. The Time Average approach is a technique that promises to be a major advance in the active control of sound and vibration. This approach is based on statistical estimates of the error signals, and does not require having previous knowledge of the system. A new minimization algorithm has been developed, which enhances the performance of the Time Average controllers. A new technique to estimate the cost function is also presented. This technique is called the Real Time Cost Function Evaluation method. Based upon these new controller design concepts, single channel and multi-channel controllers were developed and experimentally tested. The experiments included control of a harmonically excited, simply supported beam, and the control of inlet tonal noise radiated from a JT1SD-l turbofan engine.en
dc.description.degreeMaster of Scienceen
dc.format.extentix, 102 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-06082009-170722en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-06082009-170722/en
dc.identifier.urihttp://hdl.handle.net/10919/42878en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V855_1994.L364.pdfen
dc.relation.isformatofOCLC# 30815680en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V855 1994.L364en
dc.subject.lcshFeedforward control systemsen
dc.subject.lcshNoise controlen
dc.titleTime average feedforward control techniques for time varying systemsen
dc.typeThesisen
dc.type.dcmitypeTexten
thesis.degree.disciplineMechanical Engineeringen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen
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