Bending vibration control of a MR fluid embedded smart beam exposed by the conjunction of wind-induced galloping effects
Özet
This study examined the control performance of a multi-layer smart beam structure in which the
middle layer was partially filled with magnetorheological (MR) fluid. A galloping profile was
connected to the endpoint to obtain vibration from this smart beam element in a regular regime.
Flow-induced continuous vibration was created on the beam element by giving wind load from
a certain distance to this galloping profile. The natural frequency values of the smart beam
element were obtained analytically using the lumped parameter mathematical model, and their
accuracy was compared with numerical methods. An electromagnet was placed opposite to MR
fluid region to suppress vibrations by creating an actuator relationship with the smart beam. A
norm-based H∞ robust control design was realized by taking the natural frequencies of the
beam element into account. The control design was applied to the experimental system and the
effectiveness of the controller was tested under various conditions. It was observed that the
proposed MR fluid embedded active control structure has good properties to suppress the
wind-induced vibrations in practice.