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dc.contributor.authorGoncalves, Fernando D.en_US
dc.date.accessioned2014-03-14T20:43:24Z
dc.date.available2014-03-14T20:43:24Z
dc.date.issued2001-08-07en_US
dc.identifier.otheretd-08142001-105010en_US
dc.identifier.urihttp://hdl.handle.net/10919/34521
dc.description.abstractThis experimental study evaluates the dynamic response of five semi-active control policies as tested on a single suspension quarter-car system. Incorporating a magneto-rheological damper, the full-scale 2DOF quarter-car system was used to evaluate skyhook, groundhook, and hybrid control. Two alternative skyhook policies were also considered, namely displacement skyhook and relative displacement skyhook. As well as exploring the relative benefits of each of these controllers, the performance of each semi-active controller was compared to the performance of conventional passive damping. Each control policy is evaluated for its control performance under three different base excitations: chirp, step, and pure tone. Corresponding to the chirp input, transmissibilities and auto spectrums are considered for each control policy. Specifically, transmissibilities between the sprung mass displacement and the unsprung mass displacement are generated relative to the input displacement. Further, the ratio between the relative displacement across the damper and the input displacement is evaluated for each control technique. The chirp input also reveals the results of the auto spectrums of the sprung and unsprung mass accelerations. Both the step input and the pure tone input were used to generate time domain values of RMS and peak-to-peak displacements and accelerations. This study shows that semi-active control offers benefits beyond those of conventional passive damping. Further, traditional skyhook control is shown to outperform the less conventional alternative skyhook policies.en_US
dc.publisherVirginia Techen_US
dc.relation.haspartFinal_Thesis.pdfen_US
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectsuspensionsen_US
dc.subjectvehicle dynamicsen_US
dc.subjectexperimentalen_US
dc.subjectgroundhooken_US
dc.subjectmagneto-rheologicalen_US
dc.subjectsemi-activeen_US
dc.subjectskyhooken_US
dc.titleDynamic Analysis of Semi-Active Control Techniques for Vehicle Applicationsen_US
dc.typeThesisen_US
dc.contributor.departmentMechanical Engineeringen_US
dc.description.degreeMaster of Scienceen_US
thesis.degree.nameMaster of Scienceen_US
thesis.degree.levelmastersen_US
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen_US
thesis.degree.disciplineMechanical Engineeringen_US
dc.contributor.committeechairAhmadian, Mehdien_US
dc.contributor.committeememberInman, Daniel J.en_US
dc.contributor.committeememberRobertshaw, Harry H.en_US
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-08142001-105010/en_US
dc.date.sdate2001-08-14en_US
dc.date.rdate2002-08-14
dc.date.adate2001-08-14en_US


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