The design of civil engineering floors is increasingly being governed by their vibration serviceability\nperformance. This trend is the result of advancements in design technologies offering designers greater flexibilities in\nrealising more lightweight, longer span and more open-plan layouts. These floors are prone to excitation from human\nactivities. The present research work looks at analytical studies of active vibration control on a case study floor\nprototype that has been specifically designed to be representative of a real office floor structure. Specifically, it looks\nat tuning fuzzy control gains with the aim of adapting them to measured structural responses under human excitation.\nVibration mitigation performances are compared with those of a general velocity feedback controller, and these are\nfound to be identical in these sets of studies. It is also found that slightly less control force is required for the fuzzy\ncontroller scheme at moderate to low response levels and as a result of the adaptive gain, at very low responses the\ncontrol force is close to zero, which is a desirable control feature. There is also saturation in the peak gain with the\nfuzzy controller scheme, with this gain tending towards the optimal feedback gain of the direct velocity feedback\n(DVF) at high response levels for this fuzzy design.
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