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This paper deals with an experimental evaluation on Hinf DIA control of magnetic bearings with rotor unbalance. Hinf control problem which treats a mixed Dis-turbance and an Initial state uncertainty Attenuation (DIA) control is expected to provide a good transient property, and we confirmed that DIA control has a good rotational performance by some experiments. In this paper, we propose a modified control system design of H8 DIA control in order to consider the periodic disturbance for the magnetic bearings. In fact, we get a controller taken a peak at specified frequency by adding a frequency weighting function in generalized plant. Experimental results show that the proposed robust control approach is effective for improving rotational performance.

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Booktitle: Proceedings of ISMB10