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Now showing items 1-10 of 18
Adaptation, optimisation and simulation of the CSMA/CA protocol for a low earth orbit satellite UHF link
(Stellenbosch : University of Stellenbosch, 2006-12)
A low earth orbit satellite is to provide the telecommunications link to facilitate email
services to rural areas, where the infrastructure necessary for e-mail is lacking
(e.g. no telephone lines). Communication time ...
Probe characterisation, design and evaluation for the real-time quality Indication of milk
(Stellenbosch : University of Stellenbosch, 2006-12)
In order to rapidly detect, monitor and predict changes in milk as it ferments, sensors would need to be
designed specifically for milk. To this end, invasive surgical stainless steel probes were investigated and
the ...
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 ...
A permittivity measurement system for high frequency laboratories
(Stellenbosch : University of Stellenbosch, 2006-12)
The open-ended coaxial probe is revisited as a broadband measurement system for general
high frequency permittivity measurements. Three coaxial probes were developed
that are suited for the measurement of both liquids ...
Dynamic control of the permanent magnet assisted reluctance synchronous machine with constant current angle
(Stellenbosch : University of Stellenbosch, 2006-03)
This thesis is about the dynamic control of a permanent magnet assisted reluctance synchronous
machine (PMA RSM). The PMA RSM in this thesis is a 110 kW traction machine and is ideal for the
use in electrical rail vehicles. ...
The design of a telemetry system for Grumeti reserves
(Stellenbosch : University of Stellenbosch, 2006-03)
This thesis covers the design and development of a radio telemetry system
to assist in management of the Grumeti reserves. This was accomplished
through the integration of a digital data transmission system into the ...
Automatic alignment and error detection for phonetic transcriptions in the African speech technology project databases
(Stellenbosch : University of Stellenbosch, 2006-03)
The African Speech Technology (AST) project ran from 2000 to 2004 and involved collecting speech data for five South African languages, transcribing the data and building automatic speech recognition systems in these ...
The design of a CMOS sensor camera system for a nanosatellite
(Stellenbosch : University of Stellenbosch, 2006-12)
This thesis relates to the design of a camera system for a nanosatellite based on
a CMOS image sensor. The design specifications and constraints are considered
followed by the proposal of a versatile design with all the ...
Parameter extraction of superconducting integrated circuits
(Stellenbosch : University of Stellenbosch, 2006-12)
Integrated circuits are expensive to manufacture and it is important to verify the correct
operation of a circuit before fabrication. Efficient, though accurate, parameter extraction
of post-layout designs are required ...
An attitude and orbit determination and control system for a small geostationary satellite
(Stellenbosch : University of Stellenbosch, 2006-12)
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 ...