• Small-Signal analysis of asymmetrical regular sampled PWM control loops 

      Raats, Wernich (Stellenbosch : Stellenbosch University, 2017-03)
      ENGLISH ABSTRACT: In recent years it has become important to be able to design optimal PWM control loops to improve the performance of DC-AC power converters. This would depend on how accurate the stability margins of ...
    • Smart material actuator for trailing edge thickening 

      Botha, Theuns (Stellenbosch : Stellenbosch University, 2016-03)
      ENGLISH ABSTRACT: The goal of the research project is to provide the conceptual, high level and subsystem level design of an actuation system that would achieve a shape change at the trailing edge of the rudder of a next ...
    • Smart transformer communication and application in rural microgrid settings 

      Verster, Cornel (Stellenbosch : Stellenbosch University, 2015-03)
      ENGLISH ABSTRACT: The Smart Grid is an initiative to make the existing utility grid more effective and efficient by making utility infrastructure smarter. The initiative affects all areas of the utility grid and all utility ...
    • Smartphone-based nitrate sensor 

      Pereira Ingles (Stellenbosch : Stellenbosch University, 2019-12)
      ENGLISH ABSTRACT: included an extra bandpass filter. The performance of each scenario was compared against one another and with that of a laboratory spectrophotometer. Through the assessment of the three scenarios, it ...
    • Software architecture design of a software defined radio system 

      Cronje, Johannes Jacobus (Stellenbosch : Stellenbosch University, 2004-12)
      ENGLISH ABSTRACT: The high pace of technological advancement enables the realisation of ever more advanced mobile communications standards with more functionality than simple voice communications. The hardware that is ...
    • Software modem for a software defined radio system 

      Smuts, Matthys (Stellenbosch : University of Stellenbosch, 2007-03)
      The use of older and slower protocols has become increasingly difficult to justify due to the rapid pace at which telecommunications are advancing. To keep up to date with the latest technologies, the communications ...
    • A software-defined radio implementation of maritime AIS 

      Mathapo, Kgabo Frans (Stellenbosch : University of Stellenbosch, 2007-12)
      SumbandilaSat is the second South African satellite, and is scheduled to be launched in April/May 2007. A software defined radio (SDR) automatic identification system (AIS) receiver is proposed as a possible experimental ...
    • Solar array emulator 

      Tapfumanei, Takudzwa Benedict (Stellenbosch : Stellenbosch University, 2016-12)
      ENGLISH ABSTRACT: A typical photovoltaic (PV) system normally consists of the following elements: PV energy generator (cell, module or array), PV power electronic systems (grid-tie inverter or maximum power point tracker ...
    • Some design aspects of the multi flux barrier rotor reluctance synchronous machine 

      Bomela, Xola B. (Stellenbosch : Stellenbosch University, 2000-12)
      ENGLISH ABSTRACT: This thesis deals with different design aspects of the multi-flux barrier rotor of the reluctance synchronous machine (RSM). The effect of the different designs on the performance of the RSM is investigated ...
    • Space debris: pose estimation using stereo vision 

      De Jongh, Wille Carel (Stellenbosch : Stellenbosch University, 2019-04)
      ENGLISH ABSTRACT: Tracking the relative attitude and position of uncooperative in-orbit objects is vital for autonomous operations in space. Vision-based solutions have low power consumption and can provide a system with ...
    • A spaceborne GPS receiver 

      Nortier, Benjamin J. (Stellenbosch : University of Stellenbosch, 2003-12)
      ENGLISH ABSTRACT: The purpose of this study was to develop a Global Positioning System (GPS) receiver for use on a Low-Earth Orbit (LEO) satellite. The study includes an examination of some of the fundamental GPS theory ...
    • Specification, design and implementation of a flight control unit for an unmanned aerial vehicle 

      Berhens, Hartmut (Stellenbosch : Stellenbosch University, 2015-12)
      ENGLISH ABSTRACT: The specification, design and implementation of an avionics system including a flight control unit for an unmanned aerial vehicle that is suitable for research purposes is presented. The project aims ...
    • A Spectral Guide: the analysis of solar irradiance and soiling through spectroradiometry 

      Lewis, Carmen (Stellenbosch : Stellenbosch University, 2017-12)
      ENGLISH ABSTRACT: The influence of soiling on photovoltaic (PV) modules has been investigated in many research projects before, but this project extended the methods of soiling analyses on photovoltaic (PV) modules through ...
    • Speech generation in a spoken dialogue system 

      Visagie, Albertus Sybrand (Stellenbosch : University of Stellenbosch, 2004-12)
      ENGLISH ABSTRACT: Spoken dialogue systems accessed over the telephone network are rapidly becoming more popular as a means to reduce call-centre costs and improve customer experience. It is now technologically feasible ...
    • Speech recognition of South African English accents 

      Kamper, Herman (Stellenbosch : Stellenbosch University, 2012-03)
      ENGLISH ABSTRACT: Several accents of English are spoken in South Africa. Automatic speech recognition (ASR) systems should therefore be able to process the di erent accents of South African English (SAE). In South Africa, ...
    • Spray water control of a boiler superheater outlet temperature 

      Gadinger, Hans-Jürgen (Stellenbosch : Stellenbosch University, 2019-04)
      ENGLISH ABSTRACT: This thesis investigates Fuzzy and MPC control techniques for use in superheated steam temperature control through spray water quenching. The techniques are evaluated against the PID controller currently ...
    • SQUID detected low-field NMR for the evaluation of internal fruit quality 

      Van Zyl, Derrick Steven (Stellenbosch : University of Stellenbosch, 2010-12)
      ENGLISH ABSTRACT: Assessing the quality of fruit has become vitally important for farmers and growers. With retailers placing ever stricter requirements on fresh produce, growers have to spend a greater amount of time ...
    • Stall prevention control of fixed-wing unmanned aerial vehicles 

      Basson, Matthys Michaelse (Stellenbosch : University of Stellenbosch, 2010-03)
      ENGLISH ABSTRACT: This thesis presents the development of a stall prevention flight control subsystem, which can easily be integrated into existing flight control architectures of fixed-wing unmanned aerial vehicles ...
    • Stereo camera calibration 

      O'Kennedy, Brian James (Stellenbosch : Stellenbosch University, 2002-12)
      ENGLISH ABSTRACT: We present all the components needed for a fully-fledged stereo vision system, ranging from object detection through camera calibration to depth perception. We propose an efficient, automatic and practical ...
    • Stereo vision for simultaneous localization and mapping 

      Brink, Wikus (Stellenbosch : Stellenbosch University, 2012-12)
      ENGLISH ABSTRACT: Simultaneous localization and mapping (SLAM) is vital for autonomous robot navigation. The robot must build a map of its environment while tracking its own motion through that map. Although many solutions ...