• Wind Turbine and slip permanent magnet coupler design analysis for small scale fixed speed wind generator systems 

      Dumakude, Niniva (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 

      Botha, Christoffel Daniel (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 

      Kim, Hankyu (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 narrow-band X-band bandpass filters 

      Meyer, Elmine (Stellenbosch : Stellenbosch University, 2018-03)
      ENGLISH ABSTRACT: This dissertation proposes two narrow-band tunable X-band filters from different classes, one planar and one waveguide. The first is a suspended substrate varactor-tuned doubly end-loaded staircase filter ...
    • Tunable lumped element notch filter for UHF communications systems 

      Benson, Peter-Luke (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 

      Louw, Ridalise (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 

      Verrezen, Dylan (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 

      Wilke, Cornelis Rossouw (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 

      Louw, Everhard Johann (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 

      Dorfling, Martinus David (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 

      Richardson, Micheal Peter (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 

      Bester, Andries Jacobus (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 

      Geldenhuys, Joanie Michellene Claudette (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 ...
    • Magnetic modelling, analysis and on-chip shielding of SFQ Circuits 

      Bakolo, Simeon Rodwell (Stellenbosch : Stellenbosch University, 2018-03)
      ENGLISH ABSTRACT: Single Flux Quantum (SFQ) based electronic circuits are susceptible to failure if exposed to external magnetic fields, even in very small quantities. Operating margins of SFQ circuits have shown to decrease ...
    • Load management of electric water heaters in a smart grid through forecasting and intelligent centralised control 

      Roux, Marcel (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 

      Wessels, Jurie Hendrik (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 ...
    • Fast multi-core CEM solvers and flux trapping analysis for superconducting structures 

      Jackman, Kyle (Stellenbosch : Stellenbosch University, 2018-03)
      ENGLISH ABSTRACT: The dissertation presents the development of a numerical field solver, called TetraHenry (TTH), for inductance extraction and flux trapping analysis of superconducting integrated circuits. The solver ...
    • Extremum-seeking control for constrained optimal formation flight of commercial airliners 

      Van Zyl, Izaak (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 

      Sewraj, Keshav (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 

      Gurupira, Tafadza L. (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 ...