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Attitude sensor and actuator interfacing for micro-satellites
(Stellenbosch : Stellenbosch University, 2002-12)
ENGLISH ABSTRACT: The purpose of this thesis was to design and test the interfaces of sensors and actuators. In the
complete Attitude Determination and Control System CADCS) the Interface Control Processor
(ICP) must ...
Investigation of a high-speed serial bus between satellite subsystems
(Stellenbosch : Stellenbosch University, 2003-04)
ENGLISH ABSTRACT: The aim of this thesis is to investigate the implementation of a high-speed serial bus based
on the IEEE Std 1394-1995 specification for use in a microsatellite.
Earth observation microsatellites carry ...
Strategies for the control of a satellite with thruster misalignment
(Stellenbosch : University of Stellenbosch, 2006-03)
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 ...
Control moment gyro actuator for small satellite applications
(Stellenbosch : University of Stellenbosch, 2005-03)
The aim of the thesis is to design a Control Moment Gyro (CMG) actuator which can be
used in small satellite applications. The hardware and software of the CMG has to be
designed according to specifications given. A ...
An LDPC error control strategy for low earth orbit satellite communication link applications
(Stellenbosch : University of Stellenbosch, 2009-12)
ENGLISH ABSTRACT: Low earth orbit (LEO) satellite communication presents a unique environment
which inherently di ers from most other communication channels.
Due to the varying orbital patterns of LEO satellites the link ...
Java implementation of AX.25 link-layer protocol for future micro-satellites
(Stellenbosch : Stellenbosch University, 2003-04)
ENGLISH ABSTRACT: This thesis investigates the viability of implementing the AX.25 protocol in Java, for
satellite applications. The AX.25 protocol forms part of the Communications subsystem
of a micro-satellite. It ...
The evaluation of a SoC processor as an on-board computer for a low earth orbit satellite
(Stellenbosch : Stellenbosch University, 2005-04)
ENGLISH ABSTRACT: The use of commercial-off-the-shelf components in low earth orbit (LEO) satellite systems
has become a very popular design trend. Not only are many of these components
sufficiently radiation tolerant, ...
Distributed real-time processing using GNU/Linux/libré software and COTS hardware
(Stellenbosch : Stellenbosch University, 2004-03)
ENGLISH ABSTRACT: This dissertation's research aims at studying the viability of using both low cost
consumer Commodity Off The Self (COTS) PCs and libn~software in implementing a
distributed real-time system modeled ...
Modelling and evaluation of adaptive control techniques in satellite orientation during large actuator gain changes
(Stellenbosch : Stellenbosch University, 2004-04)
ENGLISH ABSTRACT: Improvements in the area of satellite orientation control in the presence of
large actuator gain changes are investigated. Gain changes primarily originate
from actuator failures, but may also result ...
The evaluation of an ARM-based on-board computer for a low earth orbit satellite
(Stellenbosch : Stellenbosch University, 2002-12)
ENGLISH ABSTRACT: The use of commercial-off-the-shelf (COTS) components and emerging technologies in
satellite systems has become increasingly popular over the past few years. This is mainly due
to advances in radiation ...