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dc.contributor.advisorGravdahl, Jan Tommy
dc.contributor.advisorGrøtte, Mariusz Eivind
dc.contributor.authorKristiansen, Bjørn Andreas
dc.date.accessioned2019-10-31T15:15:25Z
dc.date.available2019-10-31T15:15:25Z
dc.date.issued2019
dc.identifier.urihttp://hdl.handle.net/11250/2625773
dc.description.abstractDynamikken i en satellitts bane og attitude modelleres for en satellitt med reaksjon- shjul og magnetorquere som aktuatorer. Den ulineære modellen er implementert i Matlab/Simulink. Regulatorene som blir brukt er konvensjonell sliding mode con- trol, generalized super-twisting algorithm, linear-quadratic regulator og proporsjonal- derivasjon-regulator med reaksjonshjulene for peking og rotasjon. Magnetiske tor- quere brukes for å regulere tumblingen med B-dot algoritmen, samt en regulator for å regulere drivmomentet i reaksjonshjulene. Systemet blir simulert både med og uten en sliding mode observer. Resultatene fra simuleringen basererer seg på HYPSO-satellitten ved NTNU, en 6U CubeSat som vil bruke et hyperspektralt kamera for å overvåke havfarge langs norskekysten.
dc.description.abstractOrbital mechanics and attitude dynamics are modeled for a satellite actuated by re- action wheels and magnetorquers. A nonlinear satellite model is implemented in Matlab/Simulink. The controls used are conventional sliding mode control, the gener- alized super-twisting algorithm, linear-quadratic regulator, and proportional-derivative controller for both target pointing and slewing using the reaction wheels, as well as a B-dot tumbling and momentum dumping controllers using the magnetorquers. Control simulations are presented with and without a sliding mode observer. The simulation results are based on HYPSO, a 6U CubeSat mission developed at NTNU that will host a hyperspectral imager to detect and monitor ocean color along the Norwegian coast.
dc.languageeng
dc.publisherNTNU
dc.titleNonlinear Attitude Control of a Pointing and Slewing Spacecraft
dc.typeMaster thesis


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