• Analysis and synthesis of an active resonant snubber for high-power IGBT converters 

      Combrink, Frederik Wilhelm (Stellenbosch : Stellenbosch University, 2001-12)
      ENGLISH ABSTRACT: This thesis describes the study of two soft-switching inverter topologies that are well suited to high-power applications. For the first topology, namely an active resonant turn-off snubber, the existing ...
    • Analysis of voltage regulation and network support technologies 

      Rossouw, Frans Jacobus (Stellenbosch : Stellenbosch University, 2000-12)
      ENGLISH ABSTRACT: Recent advances in semiconductor device development pushed a large number of network devices onto the market. These devices can solve network problems more effectively and economically than ever before. ...
    • Analytical modelling and design optimisation of the Eddy Current Slip Coupler 

      Erasmus, Abraham Stephanus (Stellenbosch : Stellenbosch University, 2017-03)
      ENGLISH ABSTRACT: In this study a novel analytical torque calculation method is proposed and used in conjunction with existing design optimisation algorithms to design and manufacture a double sided radial axis eddy ...
    • Application of an extended Huygens' principle to scattering discontinuities in waveguide 

      Geschke, R. H. (Riana Helena) (Stellenbosch : Stellenbosch University, 2004-04)
      ENGLISH ABSTRACT: The implementation and verification of a recently proposed Huy gens' principle in hollow lossless waveguide is described. The extended Huygens' principle is applicable to the scattering effect of ...
    • The application of Probabilistic Graphical Models to Raptor codes over Binary Input Memoryless Symmetric Channel models 

      Singels, Rian (Stellenbosch : Stellenbosch University, 2016-03)
      ENGLISH ABSTRACT: Raptor codes are Forward Error Correction (FEC) codes that fall under the class of Fountain codes. This class of code can reach data-transmission rates close to the capacity of the Binary Erasure Channels ...
    • The applications of superconductors in cellular network base stations 

      Du Toit, Riaan (Stellenbosch : Stellenbosch University, 2008-03)
      ENGLISH ABSTRACT: The Applications of Superconductors in Cellular Network Base Stations R. Du Toit Department of Electronic Engineering University of Stellenbosch Private Bag X1, 7602 Matieland, South Africa Thesis: ...
    • An artificial magnetic ground-plane for a log-periodic antenna 

      Visser, Hugo Hendrik (Stellenbosch : University of Stellenbosch, 2010-03)
      ENGLISH ABSTRACT: This paper presents the implementation of an artificial magnetic ground-plane with a low profile Log-periodic Dipole Array (LPDA) antennas. After the properties of three typical Electromagnetic Bandgap ...
    • Aspect of a hardware-in-the-loop integrated test system 

      Grungxu, Lungile Leonard (Stellenbosch : Stellenbosch University, 2003-03)
      ENGLISH ABSTRACT: A multiprocessor hardware-in-the-Ioop operating system was developed for the Integrated Test System (ITS) and is aimed at implementing the ITS as a space emulation vehicle. The thesis contains a study ...
    • Aspects affecting the design of a low earth orbit satellite on-board computer 

      Grobler, H. (Stellenbosch : Stellenbosch University, 2000-12)
      ENGLISH ABSTRACT: Satellites are not all made equal. The large number of possible orbits, desired functionality and budget constraints are but a few of the factors that influence the design of a satellite. Given a ...
    • Assessment of the harmonic behaviour of a utility-scale photovoltaic plant 

      Overett, Jonathan Stephen (2017-12)
      ENGLISH ABSTRACT: The rapidly increasing deployment of utility-scale solar photovoltaic (PV) plants worldwide presents new technical challenges including the risk of unacceptably high harmonic voltage distortion in the ...
    • Asymmetrical S-band coupled resonator filters 

      Coetzee, Nicola (Stellenbosch : University of Stellenbosch, 2005-12)
      Due to a more densely packed frequency spectrum, there is an increasing demand for narrow band filters with asymmetrical transfer function characteristics. The resulting coupling matrices contain both positive and negative ...
    • An attitude and orbit determination and control system for a small geostationary satellite 

      Thopil, G. A. (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 ...
    • An attitude control system for the deployment and stabilisation of a tethered dual CubeSat mission 

      Kearney, Mike-Alec (Stellenbosch : Stellenbosch University, 2013-03)
      ENGLISH ABSTRACT: The use of electrodynamic tethers on-board satellites is an exciting scientific prospect. These conductive tethers provide the means for satellites to generate power and to do propulsion by electrodynamic ...
    • Attitude determination and control system for EyasSAT for Hardware In the Loop application 

      Groenewald, Christoffel Johannes (Stellenbosch : Stellenbosch University, 2014-04)
      ENGLISH ABSTRACT: An Attitude Determination and Control System (ADCS) demonstrator and testing platform was required for satellite engineering students. The ADCS demonstrator and testing platform will allow students to ...
    • Attitude determination and control system of a nanosatellite 

      Schoonwinkel, Johannes (Stellenbosch : University of Stellenbosch, 2007-12)
      The aim of this project was to design and test a partial attitude determination and control system for a nanosatellite. The reaction wheel system was designed and tested as an actuator for the nanosatellite. This reaction ...
    • The attitude determination and control systems (ADCS) task scheduler 

      Ntsimane, M. H. (Mpho Hendrick) (Stellenbosch : Stellenbosch University, 2001-12)
      ENGLISH ABSTRACT: A new task scheduler for the Attitude Determination and Control System (ADCS) of the Stellenbosch University Satellite (SUNSAT) has been designed and tested on a personal computer. This new scheduler ...
    • Attitude sensor and actuator interfacing for micro-satellites 

      Dlamini, Zamokwakhe P. (Zamokwakhe Peacemaker) (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 ...
    • Automated coverage calculation and test case generation 

      Morrison, George Campbell (Stellenbosch : Stellenbosch University, 2012-03)
      ENGLISH ABSTRACT: This research combines symbolic execution, a formal method of static analysis, with various test adequacy criteria, to explore the e ectiveness of using symbolic execution for calculating code coverage ...
    • The automated detection and analysis of gravitational microlensing events 

      Van Rooyen, Ruby (Stellenbosch : Stellenbosch University, 2000-12)
      ENGLISH ABSTRACT: In this thesis we addressed some issues concerning the automation of the detection, processing and the analysis of gravitational microlensing events, which are currently being used in the search for ...
    • Automated landing of a quadrotor Unmanned Aerial Vehicle on a translating platform 

      Moller, Paul Daniel Stefanus (Stellenbosch : Stellenbosch University, 2015-12)
      ENGLISH ABSTRACT: In this thesis the design, implementation and practical testing of an autolanding system responsible for landing a quadrotor Unmanned Aerial Vehicle (UAV) on a moving platform are presented. The goal ...