Misalignment Effects of the Self-Tracking Laser Doppler Vibrometer

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dc.contributor.authorZima, Andrew David Jr.en
dc.contributor.committeechairKing, Peter S.en
dc.contributor.committeememberO'Brien, Walter F. Jr.en
dc.contributor.committeememberWicks, Alfred L.en
dc.contributor.departmentMechanical Engineeringen
dc.date.accessioned2014-03-14T20:35:58Zen
dc.date.adate2001-05-12en
dc.date.available2014-03-14T20:35:58Zen
dc.date.issued2001-05-01en
dc.date.rdate2002-05-12en
dc.date.sdate2001-05-10en
dc.description.abstractThere are many limitations to the current methods used to measure vibration on rotating structures. These limitations include physical flow blockages, relating the measurement spot to the structure rotation, data processing issues, and having to physically alter the engine. This work further describes aspects of a self-tracking laser vibrometry system that can be used to measure the vibrations of rotating structures. This method, if setup correctly, has the capability to overcome many of the limitations listed above. A study of all misalignment effects is presented in this thesis. The study consists of a parametric sensitivity analysis of misalignment variables, a parametric Monte Carlo analysis of misalignment variables, and a full interaction Monte Carlo analysis of misalignment variables. In addition, the results of the misalignment variable analyses were used to develop a self-tracker test rig for obtaining fan vibration from a Pratt and Whitney JT15D turbofan engine. A prototype this test rig was designed, built, and tested on the turbofan. It was found that in order to achieve acceptable amounts of position and velocity error using the self-tracker LDV system, very strict alignment of the optical equipment is necessary. Additionally, the alignment criteria can likely be achieved with the use of digitally controlled high precision linear motion equipment.en
dc.description.degreeMaster of Scienceen
dc.identifier.otheretd-05102001-095500en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-05102001-095500/en
dc.identifier.urihttp://hdl.handle.net/10919/32471en
dc.publisherVirginia Techen
dc.relation.haspartthesis_adz.pdfen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectVibrometeren
dc.subjectMisalignmenten
dc.subjectBladeen
dc.subjectRotatingen
dc.subjectRotoren
dc.subjectLDVen
dc.subjectVibrationen
dc.subjectLaseren
dc.titleMisalignment Effects of the Self-Tracking Laser Doppler Vibrometeren
dc.typeThesisen
thesis.degree.disciplineMechanical Engineeringen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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