H_∞ control versus disturbance-observer-basedcontrol
Mita, T.; Hirata, M.; Murata, K.; Zhang, H.
Industrial Electronics, IEEE Transactions on
Volume 45, Issue 3, Jun 1998 Page(s):488 - 495
Digital Object Identifier   10.1109/41.679007
Summary:In the motion control field, a disturbance observer-based disturbance canceling control is often used as a robust control methodology. However, this method is nothing more than an alternative design of an integral controller, and the robust stability issue cannot be directly accounted for. In this paper, an extended H_∞ control scheme is proposed as a new robust motion control method which achieves the disturbance cancellation ability and guarantees robust stability automatically

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