Research on Optimal Design Method of Multi-damper Cooperative Vibration Suppression System for Wind Tunnel Models

To reduce aerodynamic interference, the wind tunnel model is fixed with a slender sting. It has the characteristics of weak stiffness and low damping. In that case, violent vibration occurs rapidly when the system is continuously excited by aerodynamic load, which can lead to inaccurate experimental data and even damage to the sting. At present, the active vibration suppression method is widely used. However, with the development of large-scale wind tunnels and high-performance aircraft, higher requirements are put forward for the vibration suppression system. There is still the problem of insufficient energy for a single damper. Therefore, an optimal design method of multi-damper cooperative vibration suppression system for wind tunnel models is proposed. Firstly, a cooperative vibration suppression structure with front and rear dampers is designed. The simulation model of rigid-flexible coupling vibration is established to realize the cooperative control simulation of the system vibration. In addition, combined with the phase compensation control algorithm, the mechatronic integrated simulation model is constructed. Further, based on the combined simulation model, structural optimization is carried out to determine the optimal layout position of dampers. Finally, the wind tunnel model multi-damper cooperative vibration suppression system is built. The results of the hammering experiment show that: Compared with the no control, the optimized cooperative control improves the damping ratio by 19.099 times and reduces the power spectral density (PSD) by 30.435 dB/Hz. Compared with the traditional single-rear control, it improves the damping ratio by 1.677 times and reduces the PSD by 8.102 dB/Hz.