System Identification and High Performance Controllers of Active\ud Magnetic Bearing Systems

In recent years, active magnetic bearing systems (AMBs) have attracted the\ud attention of researchers as suitable replacements for conventional mechanical and\ud hydrostatic bearings. The absence of mechanical frictions, high-precision and low\ud maintenance costs have all made AMBs suitable technologies for high-speed and\ud high-precision applications. However, along with the numerous advantages, several\ud challenges have hindered the widespread applications of these systems. AMBs\ud are inherently open-loop unstable and hence feedback controllers are essential for\ud stabilisation of AMB equipped systems. The multiple-input multiple-output nature\ud of AMBs and the presence of high-frequency resonant modes further exacerbate\ud the problem of modelling and control design of such systems