TY - JOUR
T1 - Linear and nonlinear active feedback controls for vortex-induced vibrations of circular cylinders
AU - Mehmood, A.
AU - Abdelkefi, A.
AU - Akhtar, I.
AU - Nayfeh, A. H.
AU - Nuhait, A.
AU - Hajj, M. R.
PY - 2014/6
Y1 - 2014/6
N2 - We consider the problem of suppressing oscillations of an elastically mounted rigid cylinder undergoing vortex-induced vibrations by linear and nonlinear active velocity feedback controllers. Each controller relies on an actuator, which imparts an opposing force to the cylinder motion, thereby reducing its high-amplitude oscillations. A strongly coupled fluid-structure numerical model is used to solve the fluid-structure interaction equations. The results show that the choice of the active feedback controller depends on the allowable controlled amplitude of the cylinder. It is found that a cubic velocity feedback controller is more efficient than its linear velocity counterpart when very small controlled amplitudes are desired.
AB - We consider the problem of suppressing oscillations of an elastically mounted rigid cylinder undergoing vortex-induced vibrations by linear and nonlinear active velocity feedback controllers. Each controller relies on an actuator, which imparts an opposing force to the cylinder motion, thereby reducing its high-amplitude oscillations. A strongly coupled fluid-structure numerical model is used to solve the fluid-structure interaction equations. The results show that the choice of the active feedback controller depends on the allowable controlled amplitude of the cylinder. It is found that a cubic velocity feedback controller is more efficient than its linear velocity counterpart when very small controlled amplitudes are desired.
KW - Circular cylinder
KW - Computational fluid dynamics
KW - Control
KW - Synchronization
KW - Vortex-induced vibration
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U2 - 10.1177/1077546312469425
DO - 10.1177/1077546312469425
M3 - Article
AN - SCOPUS:84902171235
SN - 1077-5463
VL - 20
SP - 1137
EP - 1147
JO - JVC/Journal of Vibration and Control
JF - JVC/Journal of Vibration and Control
IS - 8
ER -