Abstract
A design method of variable gain feedback controller for a building-AMD system is proposed. A constraint on AMD system such as control force or stroke of a mass damper can be considered individually in this design method. The method consists of two design stages. In the first stage one parameter a is defined which corresponds to the performance of AMD system with respect to the constraint and the variable feedback gain is evaluated as a function of parameter α. In the second stage the parameter a is changed continuously by on-line computation so as to keep the response of the AMD system within the constraint. It is shown through numerical examples that this method effectively adjusts the response of AMD system such as control force or stroke of a mass damper against the variety of intensity levels of external excitation. The performance and the application range of the AMD system is thereby improved remarkably compared to those achieved by ordinary constant gain feedback control.
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