Receptance based approach for control of floor vibrations
Nyawako, S; Ghandchi-Tehrani, M; Reynolds, P
Date: 2016
Conference paper
Publisher
European Association for the Control of Structures (EACS)
Abstract
Advances in design, materials and construction technologies, coupled with client and architectural
requirements, are some of the drivers for light-weight and slender pedestrian structures, which are
becoming increasingly susceptible to human induced vibrations. The use of active control techniques is
progressively being viewed as a ...
Advances in design, materials and construction technologies, coupled with client and architectural
requirements, are some of the drivers for light-weight and slender pedestrian structures, which are
becoming increasingly susceptible to human induced vibrations. The use of active control techniques is
progressively being viewed as a more feasible approach for suppressing such vibrations compared with
traditional passive technologies. In this paper, the principles of the receptance based approach are
exploited to design appropriate feedback gains that place the eigenvalues of selected vibration modes of
an experimental footbridge structure at selected locations thereby enhancing its vibration performance.
These studies are based on a single-input multiple-output (SIMO) controller structure comprising of a
single control actuator and two sensors. It is seen that this has the potential to offer additional design
freedoms beyond purely a direct velocity feedback (DVF) controller. A comparative study is carried out
with a DVF controller implemented in a single-input single-output (SISO) scheme. This work presents
the analytical determination of appropriate feedback gains from results of experimental modal analysis
(EMA) on the structure and thereafter the experimental implementation of these feedback gains.
Vibration mitigation performance is evaluated through both changes in measured transfer functions and
reductions in response under single pedestrian excitation.
Engineering
Faculty of Environment, Science and Economy
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