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Now showing items 1-20 of 22
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Variable speed scissored pair dual gimbal Control Moment Gyro for nano-satellites
(Stellenbosch : Stellenbosch University, 2015-12)ENGLISH ABSTRACT: The work presented in this thesis describes the development of an attitude control actuator for use in CubeSats. This actuator uses novel Control Moment Gyro technology to perform slew manoeuvres. The ... -
Towards a framework for the design and development of a system for practical education in electrical engineering
(Stellenbosch : Stellenbosch University, 2015-12)ENGLISH ABSTRACT: How to educate undergraduate students in the practical aspects of engineering is a complex problem. To address it requires both a technical solution (referring to the equipment itself) as well as a study ... -
Specification, design and implementation of a flight control unit for an unmanned aerial vehicle
(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 ... -
Rethinking electrical water heaters
(Stellenbosch : Stellenbosch University, 2015-12)ENGLISH ABSTRACT: South Africa is, at the time of writing, in the midst of an energy crisis as the national utility is unable to meet the nation’s energy demands. Electrical water heaters (EWHs) remain one of the main ... -
Real time segmentation of heart sounds
(Stellenbosch : Stellenbosch University, 2015-12)ENGLISH ABSTRACT: The poor state of the healthcare system in South Africa has resulted in unacceptable high levels of infant mortality. Congenital heart disease is one of the main contributions to these high rates of ... -
Low-cost, portable biosensors for Escherichia coli detection in water
(Stellenbosch : Stellenbosch University, 2015-12)ENGLISH ABSTRACT: Low-cost, portable biosensors for the detection of Escherichia coli (E. coli) in water were investigated. The operating principle of various biosensors is discussed at the hand of a biosensor model. ... -
A GPS-based on-board orbit propagator for low earth-orbiting CubeSats
(Stellenbosch : Stellenbosch University, 2015-12)ENGLISH ABSTRACT: On-board knowledge of satellite position is vital to all space missions. Due to the stringent power budgets of the CubeSat form factor, permanently active on-board GPS receivers for accurate navigation ... -
Forecasting methods for cloud hosted resources, a comparison
(Stellenbosch : Stellenbosch University, 2015-12)ENGLISH ABSTRACT: Cloud computing has revolutionised the modern day IT industry and continues to foster the development of new products and services. Amid the dynamically changing workloads presented to cloud computing ... -
The evaluation and testing of mobile ITS interventions on speed compliance in the minibus taxi industry of South Africa
(Stellenbosch : Stellenbosch University, 2015-12)ENGLISH ABSTRACT: Informal public transport in South Africa, dominated by minibus taxis is noted for poor compliance, and has been shown to disregard posted speed limits on long-distance trips. They go as far as driving ... -
Development of a software application utilising classical efficiency theory, regression and Data Envelopment Analysis in the evaluation of thermal power plant performance.
(Stellenbosch : Stellenbosch University, 2015-12)ENGLISH ABSTRACT: Recent capacity constraints on the South African power grid, coupled with the economic and environmental implications of increasing energy requirement, has given rise to major efforts to implement energy ... -
Development of a software application for statistical analysis of photovoltaic plant performance
(Stellenbosch : Stellenbosch University, 2015-12)ENGLISH ABSTRACT: Economic and environmental concerns together with increasing fossil fuel prices are giving rise to the incorporation of increased amounts of renewable energy sources into the power grid. Furthermore, ... -
The development of a hardware-in-the-loop platform for the attitude determination and control testing of a small satellite
(Stellenbosch : Stellenbosch University, 2015-12)ENGLISH ABSTRACT: The launch costs for satellites are extraordinarily high. This emphasizes the importance of thorough unit and subsystem level testing to minimize the risk of failure after launch. The project was aimed ... -
The design and implementation of a stellar gyroscope for accurate angular rate estimation on CubeSats
(Stellenbosch : Stellenbosch University, 2015-12)ENGLISH ABSTRACT: Until recently, small form factor satellites (such as CubeSats) relied almost exclusively on micro electromechanical system (MEMS) gyroscopes for attitude propagation purposes. Unfortunately, the nature ... -
Design and evaluation of medium speed geared direct grid connected wind generator drive train with specific focus on slip permanent magnet coupling
(Stellenbosch : Stellenbosch University, 2015-12)ENGLISH ABSTRACT: In this study an alternative drive train topology for the slip-synchronous permanent magnet generator (SS-PMG) is proposed. The SS-PMG was first proposed in 2010 and is a direct drive, direct grid-connected ... -
Design and development of a monitoring station for the long-term investigation of dust pollution effects on the performance of PV panels
(Stellenbosch : Stellenbosch University, 2015-12)ENGLISH ABSTRACT: The past decade has seen impressive growth of the photovoltaic solar power industry as a response to increased global energy demand and a quest for sustainable energy supply. It is necessary to understand ... -
The design and development of a co-pulse IFM receiver
(Stellenbosch : Stellenbosch University, 2015-12)ENGLISH ABSTRACT: The instantaneous frequency measurement (IFM) receiver is normally a subunit used in electronic warfare receivers. Its purpose is to measure the frequency of pulse and continuous wave signals over a very ... -
Comparing baseband and intermediate frequency FMCW radar receivers
(Stellenbosch : Stellenbosch University, 2015-12)ENGLISH ABSTRACT: Frequency modulated continuous wave (FMCW) radars have a large range of applications in the civilian and military sectors, including aircraft navigation (radio altimeters), subsurface examination, weather ... -
Characterization of RF signal coupling into MeerKAT telescopes
(Stellenbosch : Stellenbosch University, 2015-12)ENGLISH ABSTRACT: The study of weaker astronomical waves originating from billions of light years away could give an insight into the dawn of the universe's history. This requires the use of highly sensitive radio receivers ... -
Brush-DC Equivalent control based delta modulation for a PWM inverter-fed nine-phase induction machine drive
(Stellenbosch : Stellenbosch University, 2015-12)ENGLISH ABSTRACT: A considerable amount of research has been done on the control of induction machines since the introduction of the power electronic inverter. The use of power electronic inverters has also opened the way ... -
Biologically inspired flight : the autonomous control of a quadcopter using spiking neural networks
(Stellenbosch : Stellenbosch University, 2015-12)ENGLISH ABSTRACT: With the recent increase in the availability and popularity of micro aerial vehicles new methods for their autonomous control should be investigated. In this project the autonomous control of a flying ...
