Search Results - "du Rand, C.P."

Evaluation of demodulation algorithms for robust self-sensing active magnetic bearings by van Schoor, G., Niemann, A.C., du Rand, C.P.

“…Active magnetic bearings (AMBs) play a key role in various industrial applications. In the ongoing challenge to reduce the number of external sensing devices…”
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Enthalpy–entropy graph approach for the classification of faults in the main power system of a closed Brayton cycle HTGR by du Rand, C.P., van Schoor, G., Nieuwoudt, C.

“…An enthalpy–entropy ( h– s) graph approach for the classification of faults in a new generation type high temperature gas-cooled reactor (HTGR) is presented…”
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Integrated procedure for vibration characterization of a magnetic bearing supported rotor delevitation system by Bean, J., van Schoor, G., du Rand, C.P.

“…•The vibration characterization of a magnetic bearing supported rotor is presented.•Numerical model and experimental rotor modal analyses validate bending…”
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Frequency dependent impedance model for heteropolar magnetic bearings by Ranft, E.O., van Schoor, G., du Rand, C.P.

“…Accurate analytical models are fundamental to design and optimise high performance magnetic bearings. Understanding the bearing’s dynamic behaviour over its…”
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Self-sensing for electromagnetic actuators. Part II: Position estimation by Ranft, E.O., van Schoor, G., Rand, C.P. du

“…► Integrated parameter estimator scheme addresses magnetic cross-coupling problems. ► Dynamic weights allow stable rotor suspension for magnetically saturated…”
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Fuzzy logic controller with neural network signal predictors for complex split-range control of a hybrid actuator by van Schoor, G., Breed, D.G., du Rand, C.P.

“…•An integrated fuzzy controller is proposed for complex split-range control of a multiple nonlinear actuator.•The controller effectively coordinates and…”
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Self-sensing for electromagnetic actuators. Part I: A coupled reluctance network model approach by Ranft, E.O., van Schoor, G., du Rand, C.P.

“…► Integrated RNM is developed which addresses the magnetic cross-coupling problem. ► Complex permeability of the magnetic material is determined…”
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Fault diagnosis of generation IV nuclear HTGR components – Part I: The error enthalpy–entropy graph approach by du Rand, C.P., van Schoor, G.

“…► The h– s graph can be successfully applied for fault diagnosis of HTGR components. ► Sensitivity analyses are utilized to quantify probable HTGR fault…”
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Fault diagnosis of generation IV nuclear HTGR components – Part II: The area error enthalpy–entropy graph approach by du Rand, C.P., van Schoor, G.

“…► Different uncorrelated fault signatures are derived for HTGR component faults. ► A multiple classifier ensemble increases confidence in classification…”
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