Perturbing accelerations in low thrust trajectory optimization

dc.contributor.advisorFowler, Wallace T.
dc.creatorFeistel, Andrew S.
dc.date.accessioned2017-01-23T17:16:57Z
dc.date.available2017-01-23T17:16:57Z
dc.date.issued2007-05
dc.description.abstractThis thesis describes an implementation of perturbing accelerations in a low-thrust trajectory optimization program. The program uses an indirect method with the equinoctial elements as the states. Earth Centered Inertial expressions for perturbing accelerations are transformed into the rotating radial frame, and the Jacobian matrix of the rotating radial acceleration with respect to the equinoctial elements is formulated. Using this approach, any perturbing effect can be included into the optimization program simply by knowing the Earth Centered Inertial representation of the perturbing acceleration. This thesis includes a description of the application and testing of the new method to include third-body and zonal harmonic (J₂, J₃, J₄, J₅, and J₆) effects. Additionally, the modifications of the trajectory optimization program to utilize the optimizer SNOPT are discussed. Analytically derived partial derivatives are numerically compared with finite differences, force model results are compared with other software tools, and continuous low-thrust LEO-GEO orbit transfer problems are solved and discussed.en_US
dc.description.departmentAerospace Engineeringen_US
dc.format.mediumelectronicen_US
dc.identifierdoi:10.15781/T2VM43145
dc.identifier.urihttp://hdl.handle.net/2152/44486
dc.language.isoengen_US
dc.relation.ispartofUT Electronic Theses and Dissertationsen_US
dc.rightsCopyright © is held by the author. Presentation of this material on the Libraries' web site by University Libraries, The University of Texas at Austin was made possible under a limited license grant from the author who has retained all copyrights in the works.en_US
dc.rights.restrictionRestricteden_US
dc.subjectPerturbing accelerationsen_US
dc.subjectLow thrust trajectoryen_US
dc.subjectOptimization programsen_US
dc.titlePerturbing accelerations in low thrust trajectory optimizationen_US
dc.typeThesisen_US
dc.type.genreThesisen_US
thesis.degree.departmentAerospace Engineeringen_US
thesis.degree.disciplineAerospace Engineeringen_US
thesis.degree.grantorUniversity of Texas at Austinen_US
thesis.degree.levelMastersen_US
thesis.degree.nameMaster of Scienceen_US
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