Active magnetic bearings control

In the paper a decentralized control for active magnetic bearings is discussed. For the numerical evaluation of different control algorithms a mathematical model of the controlled plant is determined. For this reason basic characteristics and fundamental operation principle of magnetic levitation as well mathematical model of the rigid shaft are presented. Modern control systems for magnetic levitations are discussed. The majority of industrial applications of active magnetic bearings were still based on conventional PID control system. The control system design is presented as rule based procedure. The sensitivity of control system on supplementary dynamics, parameter variations and measurement noise is analyzed. The active magnetic bearing laboratory system is shown. The obtained simulation and experimental results are compared.