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Strategies for the control of a satellite with thruster misalignment

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dc.contributor.advisor Treunicht J, Mr en
dc.contributor.author Van Daalen CE en
dc.date.accessioned 2016-09-22T08:35:05Z
dc.date.available 2016-09-22T08:35:05Z
dc.date.submitted 2006 en
dc.identifier.uri http://hdl.handle.net/20.500.11892/31765
dc.description.abstract This project investigates two problems related to satellites that contain cold gas thrusters and reaction wheels. The first problem concerns the estimation of the thruster force response to a pulse command. An optimal data integration method is developed and implemented to estimate the thruster force output from a number of noisy sensors. The second problem occurs when the output force vector of a thruster mounted on a satellite is misaligned with the centre of mass of the satellite. As a result a disturbance torque is generated on the satellite during thruster operation. This project investigates two strategies additional to a standard feedback controller, using the combination of thrusters and reaction wheels, to improve compensation for the disturbance torque. The first thruster misalignment compensation strategy, adaptive thrust feedforward, uses an online identification of the thruster misalignment to implement a thrust feedforward configuration to improve the disturbance torque rejection. The second strategy, composite thrusting, adjusts the switch-on times and satellite orientation for a set of thruster pulses by means of a cost function minimisation algorithm in order for the satellite to reach a target position with a specified velocity direction. The performance of the misalignment compensation strategies is illustrated by implementation on a glass-topped table and air bearing platform that simulate satellite dynamics for three degrees of freedom. en
dc.language English en
dc.title Strategies for the control of a satellite with thruster misalignment en
dc.type Masters degree en
dc.description.degree MScEng en


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