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dc.contributor.advisorNewman, James H.
dc.contributor.advisorKwon, Young W.
dc.contributor.authorKaushish, Vidur
dc.dateJune 2014
dc.date.accessioned2014-08-13T20:17:46Z
dc.date.available2014-08-13T20:17:46Z
dc.date.issued2014-06
dc.identifier.urihttp://hdl.handle.net/10945/42656
dc.descriptionApproved for public release; distribution is unlimiteden_US
dc.description.abstractThe Naval Postgraduate School CubeSat Launcher (NPSCuL) is a five-sided structure capable of carrying up to 24 CubeSats to orbit. The vibration test environment for CubeSats flying on NPSCuL on the Atlas-V is extremely harsh, partly due to the input vibration environment from the launch vehicle itself, and partly due to amplification from the NPSCuL structure. This thesis documents the implementation of a relatively new technology, Force Limited Vibration Testing (FLVT), and the design of a stiffer structure to reduce the vibration environment for NPSCuL payloads. Most acceleration-controlled vibration tests result in significant over-test. FLVT limits shaker forces, producing more realistic tests and potentially provides relief to payloads. Additionally, increasing the stiffness of NPSCuL using an isogrid design, aimed to increase its first-fundamental frequency, could result in less displacement at higher frequencies for a given amount of input energy, possibly improving the payload vibration environment. It was found that FLVT was very successful in reducing vibration environments for NPSCuL payloads. Although redesigning NPSCuL using an isogrid design achieved the goal of increasing system stiffness, it did not reduce the vibration environment. None the less, lessons learned from the redesign process will be valuable for continuing vibration environment reduction efforts.en_US
dc.description.urihttp://archive.org/details/forcelimitedvibr1094542656
dc.publisherMonterey, California: Naval Postgraduate Schoolen_US
dc.rightsThis publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. As such, it is in the public domain, and under the provisions of Title 17, United States Code, Section 105, may not be copyrighted.en_US
dc.titleForce limited vibration testing and subsequent redesign of the Naval Postgraduate School CubeSat launcheren_US
dc.typeThesisen_US
dc.contributor.departmentMechanical and Aerospace Engineering (MAE)
dc.subject.authorForce Limited Vibration Testingen_US
dc.subject.authorIsogriden_US
dc.subject.authorIncreasing stiffnessen_US
dc.subject.authorFinite Element Analysisen_US
dc.subject.authorRandom Vibrationen_US
dc.subject.authorSine Sweepsen_US
dc.subject.authorDynamic Analysisen_US
dc.subject.authorStress Analysisen_US
dc.description.serviceCivilian, Department of Defenseen_US
etd.thesisdegree.nameMaster of Science in Astronautical Engineeringen_US
etd.thesisdegree.levelMastersen_US
etd.thesisdegree.disciplineAstronautical Engineeringen_US
etd.thesisdegree.grantorNaval Postgraduate Schoolen_US


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