Modelling, Identification and Control of an AMB System for the Support of a High-Speed Flywheel

The paper describes the modelling, closed-loop identification, and control of an active magnetic bearing (AMB) system to support a high-speed flywheel in an energy storage/peak power buffer system. Experimental frequency-domain data is applied to a model-order reduction procedure, based on ,usynthesis, to provide the open-loop transfer function of the AMB's. Loop-shaping is subsequently used to design a compensator to impart robust stability and desired dynamic stiffness attributes to the system, based on QFT templates. Experimental results are included to demonstrate the real-time dynamic behaviour of the AMB's, and thereby validate the modelling, identification and controller design procedure.