Abstract
In this work, the problem of vibration control for a contactless drive system is considered, A contactless drive system is a magnetic nut/leadscrew and air bearing assembly that operates on the principle of magnetic/aerodynamic suspension to position a load with high accuracy, However, the dynamics of such system is marginally stable, non-minimum phase, and difficult to stabilize by conventional linear controllers. The technique of passband shaping [1] is applied to regulate plant dynamics and to reject disturbances. It is shown that the passband controller possesses a modular structure and is easy to implement. Simulation results also confirm the vibration suppression capabilities of this controller.
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