Browsing Faculty of Engineering by Issue Date

Data acquisition system for capturing dynamic transients in a control valve

Helling, Arnold; Van Schoor, George; Helberg, Albert S.J. (IEEE, 2004)

This work presents the development of a data acquisition (DAQ) system to be used in conjunction with fuzzy modelling to derive a dynamic mathematical model of a control valve. Characterising the behaviour of a control valve ...

Linear model of a closed three-shaft Brayton cycle

Van Niekerk, Carl R.; Van Schoor, George; Pritchard, John F. (IEEE, 2004)

A linear model of a closed three-shaft Brayton cycle is developed. The model is intended to give an understanding of the dominant dynamic behavior in a nuclear power system that utilizes a closed three-shaft Brayton cycle. ...

Status of international interconnections and electricity deregulation in Africa: an overview of the current status in Southern Africa

De Kock, Jan A. (IEEE, 2004)

The Southern African power system is in a state of flux. The grid is expanding and more interconnections are being made. However, vastness of the area and the low power consumption density in most African countries makes ...

The development process of an axial active magnetic bearing

Gouws, R.; Van Schoor, G. (2005)

The purpose of this paper is to motivate and inspire students to investigate and understand fundamental principles of electrical engineering such as magnetic levitation, control theory and sensor design. This paper describes ...

Action evolution for intelligent agents

Neser, Morné; Tessendorf, Rodney E.; Van Schoor, George (IEEE, 2005)

This paper introduces an alternative method of reinforcement learning for intelligent agents. The aim with this method is to closer emulate the natural thought processes of problem solving. This paper only provides a ...

Linear model of a closed three-shaft Brayton cycle

Van Niekerk, C.R.; Pritchard, J.F.; Van Schoor, G.; Van Wyk, M.A. (SAIEEE, 2006)

A linear model of a closed three-shaft Brayton cycle at normal power operation is developed. The model is intended to give an understanding of the dominant dynamic behaviour in a nuclear power system ...

A systems CFD model of a packed bed high temperature gas-cooled nuclear reactor

Du Toit, C.G.; Rousseau, P.G.; Greyvenstein, G.P.; Landman, W.A. (Elsevier, 2006)

The theoretical basis and conceptual formulation of a comprehensive reactor model to simulate the thermal-fluid phenomena of the PBMR reactor core and core structures is given. Through a rigorous analysis the fundamental ...

Validation of a transient thermal-fluid systems CFD model for a packed bed high temperature gas-cooled nuclear reactor

Rousseau, P.G.; Du Toit, C.G.; Landman, W.A. (Elsevier, 2006)

This paper provides an overview of the theoretical basis for a new thermal-fluid systems CFD simulation model for high temperature gas-cooled reactors, contained in the Flownex software code. Flownex provides for detailed ...

The global galerkin finite element method as applied to the 1d beam equation: a systems approach

Du Toit, C.G. (SAAM, 2006)

The paper focuses on the finite element solution of the fourth-order differential for an EulerBernoulli beam. In this approach the point point loads and concentrated moments are treated in a natural way as part of the ...

Manipulation of gasification coal feed in order to increase the ash fusion temperature of the coal enabling the gasifiers to operate at higher temperatures

Van Dyk, J.C.; Waanders, F.B. (Elsevier, 2007)

A current analysis and correction system for vibration forces on the rotor of a rotating active magnetic bearing system

Gouws, R.; Van Schoor, G. (SAIEE, 2007)

In this paper, an on-line detection, correction and identification system for vibration forces on the rotor of a rotating active magnetic bearing is proposed. The on-line detection system performs current analysis by ...

A comparative study on fault detection and correction techniques on active magnetic bearing systems

Gouws, Rupert; Van Schoor, George (IEEE-Institute of Electrical and Electronics Engineers, 2007)

In this paper, the authors distinguish between three real-time fault detection, correction and identification schemes for vibration forces on the rotor of a rotational active magnetic bearing (AMB) system. Historical fault ...

The development of a flexible rotor active magnetic bearing system

Ranft, E.O.; Van Schoor, G.; Roberts, J.G. (SAIEEE, 2007)

A design process comprising aspects of modelling and analysis is developed, implemented and verified for a flexible rotor active magnetic bearing system. The system is specified to experience the first three critical ...

Data mining: a technique used to extract information from tan delta measurements on medium voltage induction motors

John, P.M.; De Kock, J.A. (IEEE, 2007)

The study attempted to understand the condition of the insulation system and to classify the data according to its condition. Data mining processes were used to gain insight into the data and the condition of the insulation ...

A qualitative assessment of the insulation systems of medium voltage induction motors

John, P.M.; De Kock, J.A.; Wolmerans, A.D.W. (IEEE, 2007)

The research was an attempt to understand the condition of the insulation system and to classify the data according to its condition. Data mining processes was used to create a model to gain insight into the data and the ...

Properties of high ash coal-char particles derived from inertinite-rich coal. II. Gasification kinetics with carbon dioxide

Everson, Raymond C.; Neomagus, Hein W.J.P.; Kaitano, Rufaro; Falcon, Rosemary; Du Cann, Vivien M. (Elsevier Science Limited, 2008)