Browsing by Issue Date
Now showing items 1-20 of 29
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Wind Turbine and slip permanent magnet coupler design analysis for small scale fixed speed wind generator systems
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH ABSTRACT: Very recently has the concept of a slip coupler been introduced in wind energy applications. It forms part of the SS-PMG and there is extensive work being done in evaluating the technology. It's application ... -
Variable speed and torque control of a wind turbine system with assisted reluctance synchronous generator technology
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH ABSTRACT: Small-scale wind turbines provide a viable alternative energy source for small farms, business and rural areas. The goal of such small-scale turbines is to provide electricity at the lowest cost possible. ... -
Ultrasound 3D gesture recognition
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH ABSTRACT: Interest in gesture recognition systems have grown with the recent advancements in the field of virtual and augmented reality. Gesture recognition provides a flexible interface that is not bound by the ... -
Tunable lumped element notch filter for UHF communications systems
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH ABSTRACT: The focus of this work is to solve for the electromagnetic problem of large linear antenna arrays efficiently and accurately within the context of two-dimensional (2D), transverse magnetic (TM) Method ... -
Surrogate modelling of performance metrics of a wideband feed for the SKA reflector antenna
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH ABSTRACT: The focus of this thesis is on a design methodology for a pyramidal sinuous antenna for use as a wideband feed in the SKA reflector antenna system. The design objective is to maximise the receiving ... -
Recommender systems with Bayesian aspect models and the effect of approximate inference
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH ABSTRACT: Recommender systems form an important part of the modern world. These systems allow users to find relevant items in often huge item collections. Collaborative filtering is a pervasive and popular form ... -
Quantization effects on beamforming in dense phased arrays
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH ABSTRACT: Reflector-based radio telescopes have traditionally been the instrument of choice in Radio Astronomy since around the 1960’s. However, in particular for frequencies below around 1 GHz, a new generation ... -
A probabilistic graphical model approach to multiple object tracking
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH ABSTRACT: Probabilistic graphical models (PGMs) provide a framework for efficient probabilistic inference using graphs that correspond to factorised representations of high-dimensional probability distributions. The ... -
Practical implementation of long-horizon direct model predictive control
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH ABSTRACT: The use of model predictive control in power electronics has increased significantly in recent years. More specifically, the so-called direct model predictive control methods are primarily considered for ... -
Physical optics based methods for scattering analysis
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH ABSTRACT: The physical optics (PO) approximation is often used in asymptotic, electromagnetic scattering analysis to calculate the induced current on a perfectly conducting surface, represented by a mesh. The ... -
Motion planning for an autonomous terrestrial ehicle in static environments
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH ABSTRACT: Ground or land-based vehicles capable of navigating autonomously in various environments are rapidly becoming more popular and have multiple advantages and uses, from a Mars rover to autonomous agricultural ... -
Model predictive control of a grid-connected converter With LCL-filter
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH ABSTRACT: Improved efficiency of power conversion is high priority when it comes to renewable energy applications. Model predictive control (MPC) can be used to optimise the switching pattern applied in the ... -
Load management of electric water heaters in a smart grid through forecasting and intelligent centralised control
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH ABSTRACT: Globally utilities are facing increasing demand and numerous challenges arise with the supply and management thereof. The South African electricity utility Eskom is at present still facing difficulty ... -
Infrared horizon sensor for CubeSat implementation
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH ABSTRACT: Attitude determination is essential in satellite design, as it directly affects the pointing ability of the satellite. In the CubeSat industry there exists a need for high accuracy attitude sensors that ... -
Extremum-seeking control for constrained optimal formation flight of commercial airliners
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH ABSTRACT: Formation flight of commercial airliners has become a topic of interest due to the possibility of significant fuel savings. With air traffic rapidly increasing, the aeronautical industry recognizes the ... -
Extensions to the characteristic basis function method, for antenna array analysis
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH ABSTRACT: The focus of this work is to solve for the electromagnetic problem of large linear antenna arrays efficiently and accurately within the context of two-dimensional (2D), transverse magnetic (TM) Method ... -
Evaluation and optimisation of photovoltaic (PV) plant designs
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH ABSTRACT: Factors such as the increasing energy demand, the depletion of fossil fuels and the push for more sustainable, less polluting energy sources have resulted in increased interest and investments in renewable ... -
Enabling low voltage grid visibility to detect safety hazards
(2018-03)ENGLISH ABSTRACT: The low voltage (LV) network poses various hazards to humans and animals. In rural and deep rural areas the risk of electrocution and fire hazard is augmented, largely due to overhead conductors being ... -
Dynamics of a grid-connected small-scale geared wind turbine with slip-yynchronous technology
(2018-03)ENGLISH ABSTRACT: In this study, the dynamic behaviour of a 2.2 kW, fixed-speed downwind turbine is investigated. The downwind turbine drivetrain comprises of 1.9 m turbine blades, a gearbox with gear ratio of 1:3.78, a ... -
Development of a non-invasive water flow meter for a smart geyser
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH ABSTRACT: South Africa has experienced electricity and water shortages in recent years. The use of smart geyser controller units has the potential to decrease the electricity and water consumption associated with ...
