An attitude and orbit determination and control system for a small geostationary satellite
dc.contributor.advisor | Steyn, W. H. | |
dc.contributor.author | Thopil, G. A. | en_ZA |
dc.contributor.other | University of Stellenbosch. Faculty of Engineering. Dept. of Electrical and Electronic Engineering. | |
dc.date.accessioned | 2008-08-04T09:56:48Z | en_ZA |
dc.date.accessioned | 2010-06-01T08:45:07Z | |
dc.date.available | 2008-08-04T09:56:48Z | en_ZA |
dc.date.available | 2010-06-01T08:45:07Z | |
dc.date.issued | 2006-12 | en_ZA |
dc.description | Thesis (MScEng (Electrical and Electronic Engineering))--University of Stellenbosch, 2006. | |
dc.description.abstract | An analysis of the attitude determination and control system required for a small geostationary satellite is performed in this thesis. A three axis quaternion feedback reaction wheel control system is the primary control system used to meet the stringent accuracy requirements. A momentum bias controller is also evaluated to provide redundancy and to extend actuator life. Momentum dumping is preformed by magnetic torque rods using a crossproduct controller. Performance of three axis thruster control is also evaluated. A full state Extended Kalman filter is used to determine attitude and body angular rates during normal operation whereas a Multiplicative Extended Kalman Filter is used during attitude manoeuvres. An analytical orbit control study is also performed to calculate the propellant required to perform station-keeping, for a specific sub-satellite location over a ten year period. Finally an investigation on the effects caused by thruster misalignment, on satellite attitude is also performed. | en_ZA |
dc.identifier.uri | http://hdl.handle.net/10019.1/2284 | |
dc.language.iso | en | en_ZA |
dc.publisher | Stellenbosch : University of Stellenbosch | |
dc.rights.holder | University of Stellenbosch | |
dc.subject | Geostationary satellites | en_ZA |
dc.subject | Orbit control | en_ZA |
dc.subject | Attitude determination and control system | en_ZA |
dc.subject | Dissertations -- Electronic engineering | en_ZA |
dc.subject | Theses -- Electronic engineering | en_ZA |
dc.subject.other | Electrical and Electronic Engineering | en_ZA |
dc.title | An attitude and orbit determination and control system for a small geostationary satellite | en_ZA |
dc.type | Thesis | en_ZA |
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