One of the main issues in the pipes’ structure that could be affected by wind that led to the failure of the cylinder pipe structure is vortex-induced vibration (VIV). Therefore, there is a need to control the wind that is going through the pipe to avoid vibration. This phenomenon leads to the failure of the structure due to the resonance phenomenon when the natural frequency of the structure is equal to the vortex frequency. The main contributions of this work are mathematical modeling of the system using NARX and suppressing the vibration caused by wind currents through simulation and experiment ways. PI-PSO control employed to reduce the unwanted vibration as a simulation work. Then, an experimental study implemented on the structure as an open and closed loop control techniques to decrease the vibration with disturbance vibrations of 5 and 10 m/s. Open loop active vibration control (OLAVC) is proposed in this work using dual control rods made from hollow stainless steel and driven by dual DC motors in two positions at 6, 8, 10, and 12 DCV. The control rods are located beside the main cylinder pipe (CRBCP) and from the upper and lower of the hollow cylinder pipe. The effectiveness of the passive control strategy was confirmed before supplying electricity to the two DC motors on both sides. The PI controller tuned by the PSO method was developed to control unwanted model vibration. Based on the control results, the best values of K P and K I were 35.78 and 50 respectively at the lowest MSE of 1.3557×10 -4 , and the frequency magnitude was reduced by 81.17 %. The findings also showed that the cylinder pipe vibration could not be sufficiently suppressed by the passive control method. While OLAVC succeeded in reducing the vibration when the motor voltage was at 12 V. Finally, the closed-loop control technique decreased the vibration up to 61.24 % and 58.65% for disturbance wind speeds of 5 and 10 m/s, respectively.
Jasim et al. (Sun,) studied this question.