Thesis (MEng (Electrical and Electronic Engineering))--University of Stellenbosch, 1995. / 189 leaves single sided printed, preliminary pages and numbered pages 1-126. Includes bibliography, list of appendixes, figures, notation and symbols. Digitized at 300 dpi (OCR), using a Bizhub 250 Scanner. / ENGLISH ABSTRACT: The Sunsat microsatellite is being developed at the University of Stellenbosch. It is
equipped with a high resolution earth imager which requires a sophisticated attitude
determination and control system. Precise control of the satellite is impossible without
high precision attitude sensors. The most accurate attitude sensor presently used by
satellites is the star sensor.
The aim 'of this thesis is to develop a low cost, high precision star sensor for the
Sunsat microsatellite. The development included the selection of electronic and
optical hardware followed by the design, construction and testing of the sensor.
Software algorithms were developed and programmed to control the imager, extract
stars from images and match the observed constellations to a star catalogue. A set of
matching observed and reference vectors are passed to the attitude determination and
control system which calculates the three axis orientation of the satellite. / AFRIKAANSE OPSOMMING: Die Sunsat mikrosatelliet word tans by die Universiteit van Stellenbosch ontwikkel.
Dit is toegerus met 'n hoeresolusie aardwaarnemingskamera en vereis 'n gevorderde
orientasiebepaling-en beheerstelsel. Presiese beheer is onmoontlik sonder akkurate
sensore. 'n Stersensor is die mees akkurate tipe sensor waarmee satelliete tans
toegerus word.
Die doelwit van hierdie tesis is die ontwikkeling van 'n hoe resolusie, laekoste
stersensor vir die Sunsat mikrosatelliet. Die ontwikkeling behels die seleksie van
elektroniese en optiese apparatuur wat gevolg is deur die ontwerp, opbou en toets van
die sensor. Programmatuur algoritrnes is ontwerp om die kamera te beheer, sterre in
fotos te herken en waargenome konstellasies in die sterkatalogus te vind. 'n Stel
waargenome en verwysingsvektore stel die orientasiebepaling-en beheerstelsel in staat
om die orientasie van die satelliet te bereken.
| Identifer | oai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:sun/oai:scholar.sun.ac.za:10019.1/4659 |
| Date | 12 1900 |
| Creators | Jacobs, M. J. |
| Contributors | Steyn, W. H., University of Stellenbosch. Faculty of Engineering. Dept. of Electrical and Electronic Engineering., University of Stellenbosch. Faculty of Engineering. Dept. of Electrical and Electronic Engineering. |
| Publisher | Stellenbosch : University of Stellenbosch |
| Source Sets | South African National ETD Portal |
| Language | en_ZA |
| Detected Language | English |
| Type | Thesis |
| Rights | University of Stellenbosch |
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