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In this paper, we propose a bearing redundant coordinates and decoupled PD controller for 5-axis active magnetic bearing system, which consists of two bearing parts such as three-pole hybrid active magnetic bearing to stabilize the radial direction and ring-type permanent magnetic bearing stabilizing in axial and tilting motion. Based on derived system equation with decoupled control scheme, we examine controllability and observability as well as numerical modal analysis. The experiments are also carried out in order to verify the effectiveness of the proposed controller in stabilizing the transient and steady state response of the rotor.

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Booktitle: Proceedings of ISMB11