Fuzzy Logic Controller Scheme for Floor Vibration Control
Nyawako, Donald S.
Leal Pimentel, R
MATEC Web of Conferences
This is the final version of the article. Available from EDP Sciences via the DOI in this record.
© 2015 Owned by the authors, published by EDP Sciences. The design of civil engineering floors is increasingly being governed by their vibration serviceability performance. This trend is the result of advancements in design technologies offering designers greater flexibilities in realising more lightweight, longer span and more open-plan layouts. These floors are prone to excitation from human activities. The present research work looks at analytical studies of active vibration control on a case study floor prototype that has been specifically designed to be representative of a real office floor structure. Specifically, it looks at tuning fuzzy control gains with the aim of adapting them to measured structural responses under human excitation. Vibration mitigation performances are compared with those of a general velocity feedback controller, and these are found to be identical in these sets of studies. It is also found that slightly less control force is required for the fuzzy controller scheme at moderate to low response levels and as a result of the adaptive gain, at very low responses the control force is close to zero, which is a desirable control feature. There is also saturation in the peak gain with the fuzzy controller scheme, with this gain tending towards the optimal feedback gain of the direct velocity feedback (DVF) at high response levels for this fuzzy design.
The authors would like to acknowledge the financial assistance provided by the UK Engineering and Physical Sciences Research Council (EPSRC) through a responsive mode grant (Ref. EP/H009825/1), a Platform Grant (Ref. EP/G061130/2) and a Leadership Fellowship Grant (Ref. EP/J004081/2). Also acknowledged are the British Council (UK) through the Researcher Links programme and Brazilian institutions CNPq and CAPES financial support.
MATEC Web of Conferences, 2015, Vol. 24, Article number 06005