Now showing items 1-3 of 3

    • LTI modelling of active magnetic bearings by means of system identification 

      Van Schoor, George; Van Vuuren, Pieter Andries; Venter, Willem Christiaan (SAIEE Publications, 2011)
      A relatively unknown phenomenon in active magnetic bearings (AMBs) is that the frequency content of their rotor position signal can induce nonlinear behaviour in the bearings. The existence of such frequency-induced nonlinear ...
    • Multivariable H∞ or Centre of gravity PD control for an active magnetic bearing flywheel system 

      Steyn, Stephanus Jacobus Marais; Van Schoor, George; Van Vuuren, Pieter Andries (SAIEE Publications, 2011)
      A state-space model with uncertainties for an active magnetic bearing energy storage flywheel system (Fly-UPS) is developed. A multivariable robust H∞ controller for the Fly-UPS is then synthesised. Different weighting ...
    • µ-Analysis applied to self-sensing active magnetic bearings 

      Van Schoor, George; Van Vuuren, Pieter Andries (SAIEE Publications, 2011)
      The stability margin of a two degree-of-freedom self-sensing active magnetic bearing (AMB) is estimated by means of µ-analysis. The specific self-sensing algorithm implemented in this study is the direct current measurement ...