Browsing Conference Papers by Author "12134457 - Van Schoor, George"
Now showing items 1-20 of 39
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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 ... -
Active surface area approximation in a lead-acid cell for optimal performance in renewable energy systems
Janse van Rensburg, Angelique; Van Schoor, George; Van Vuuren, Pieter A. (IFAC, 2014)In a renewable energy system, lead-acid batteries are required to last as long as possible whilst providing deep discharges and are usually charged in an intermittent manner. This type of operation is severely detrimental ... -
Alcohol and the oculomotor neural circuit: system identification, a delay-based approach
Du Plessis, Willem; Van Vuuren, Pieter; Van Schoor, George (IEEE, 2015)A fair amount of research has been done on the modeling of the oculomotor system. Models of the oculomotor neural circuitry that include the effect of alcohol are less plentiful in literature. We investigated the ... -
Block RAM implementation of a reconfigurable real-time PID controller
Le Roux, Rikus; Van Schoor, George; Van Vuuren, Pieter (IEEE, 2012)Despite the numerous advantages reconfigurable computing adds to a system, it is only advantageous if the execution time exceeds the configuration time. As a result of the long configuration time, reconfiguration is only ... -
Cathodic protection system design framework
Diedericks, Dewald E.; Van Schoor, George; Ranft, Eugén O. (IEEE, 2019)The aim of this article is to establish a cathodic protection (CP) system design framework for the petrochemical industry in South Africa. The CP system design framework is destined to be used as a guideline when designing ... -
The characterization of the severity of rotor delevitation events: a parametric study
Janse van Rensburg, Jan J.; Van Schoor, George; Van Vuuren, Pieter A. (s.n, 2012)Active magnetic bearing (AMB) failure and the ensuing rotor behavior is a very important aspect of AMB safety. A model for this rotor behavior was developed and was used to characterize the severity of rotor delevitation ... -
Comparative study of steam vs hot water as primary heat transfer medium for a laboratory scale two-tank heated system
Oberholzer, P.Z.; Uren, K.R.; Van Schoor, G.; Van Niekerk, W. (IEEE, 2019)The need exists for a benchmark multi-domain practical system that could emulate typical process faults for the purposes of condition monitoring. A proposition was made to develop a heated two-tank system, due to its ... -
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 ... -
Computational cost of an exergy-based fault detection scheme implemented in a commercial process simulator
Marais, Henri; Van Schoor, George; Uren, Kenneth R. (Elsevier, 2019)Energy-based fault detection and isolation (FDI) schemes show promise in terms of applicability to petrochemical industries and the broader process industries. Model-based FDI schemes offer pronounced advantages over more ... -
Control of magnetically suspended rotor combined with motor drive system
Kruger, Gert L.; Van Schoor, George; Van Vuuren, Pieter A. (IFAC, 2014)This paper presents the cooperative control between the active magnetic bearing system and the permanent magnet synchronous drive. More specifically, the coupling between the vibration control and sensorless drive control ... -
CREAK descriptor evaluation for visual odometry
Smulders, Dehan; Uren, Kenneth; Van Schoor, George; Van Daalen, Corné; Engelbrecht, Japie (IEEE, 2019)Each year, latest state of the art technologies and algorithms arise that claim and prove to-shine their predecessors. One such algorithm is the Colour-based Retina Key-point (CREAK) descriptor, which is based on the FAST ... -
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 ... -
Energy and exergy analyses of a subcritical pulverised coal-fired boiler based on the effects of slagging and fouling
Martinson, C.A.; Van Schoor, G.; Uren, K.R. (Elsevier, 2017)Globally coal-fired power plants are still predominantly utilised for production of electrical energy. The efficiency of a coal-fired power plant is greatly influenced by the performance of the boiler. In turn, the boiler ... -
An energy perspective on modelling, supervision, and control of large-scale industrial systems: survey and framework
Van Schoor, George; Uren, Kenneth R.; Van Vuuren, Pieter A.; Du Rand, Carel P.; Van Wyk, Michael A. (IFAC, 2014)Energy is a universal concept that can be used across physical domains to describe complex large-scale industrial systems. This brief survey and framework gives a perspective on energy as a unifying domain for system ... -
An energy-attributed graph approach for the purposes of FDI in a heated two-tank system
Uren, Kenneth R.; Van Schoor, George; Auret, Lidia (Elsevier, 2019)The focus of this paper is the development of attributed graph representations of industrial processes. In this case energy attributes are used since it serves a data reduction purpose and allows for the consideration of ... -
Energy-based visualisation of a counter-flow heat exchanger for the purpose of fault identification
Uren, Kenneth R.; Van Schoor, George (Elsevier, 2016)The need for fault detection and diagnosis (FDD) is becoming increasingly important for industrial processes as the complexity of processes increases. A state space model of a counter-flow heat exchanger is used study to ... -
Energy-based visualisation of an axial-flow compressor system for the purposes of fault detection and diagnosis
Fouché, L.B.; Uren, K.R.; Van Schoor, G. (Elsevier, 2016)As the complexity of industrial systems increases, the necessity also increases for more reliable, robust and accurate Fault Detection and Diagnosis (FDD) techniques. This article proposes a methodology for the design of ... -
Equivalent electrical circuit modelling of a Proton Exchange Membrane electrolyser based on current interruption
Martinson, Christiaan; Van Schoor, George; Bessarabov, Dmitri (IEEE, 2013)A Proton Exchange Membrane (PEM) electrolyser is characterised and modelled to identify important electrochemical effects. These electrochemical effects include the ohmic, activation, and concentration losses within the ... -
Experimentelle und theoretische Untersuchungen zum Rotorabsturz in Wälzlager
Vanek, C.; Janse van Rensburg, J.J.; Van Schoor, G.; Worlitz, F. (2011)Um eine Auslegung von Fanglagern durchzuführen ist es notwendig, die Belastungen dieser in den zu erwartenden Abwurfszenarien zu kennen. Da so ein chaotischer Vorgang schwer analytisch berechnet werden kann, ist es ... -
Flight controller and low-cost test environment for a simulated helicopter
Terblanche, Martin C.; Uren, Kenneth R.; Van Schoor, George (IFAC, 2014)In this paper, optimal linear control techniques are utilised to control a radio-controlled helicopter (30 size) in the AeroSIMRC simulation environment. A grey-box time-domain system identification method is used to ...