跨声速风洞模型主动减振系统试验研究

为解决跨声速风洞测力试验模型的俯仰振动问题,研制了一套主动减振系统。该系统利用了模型/天平/支杆系统的响应特性,采用主动控制方法,以天平信号作为输入,采用速度负反馈,使用安装在支杆后端主动接头内的压电陶瓷作动器来抑制模型振动。地面试验结果表明,主动减振系统使模型/天平/支杆系统的俯仰一、二阶阻尼比分别提高20.8倍和12.8倍。风洞试验结果显示,法向力和俯仰力矩振动幅度分别下降71.0%和57.5%,风洞试验结果还表明主动减振系统对气动系数的影响相对较小。主动减振系统在多个模型的风洞试验中也得到验证,显示出良好的减振性能和模型适应性。

Experiment on Active Vibration Reduction System for Transonic Wind Tunnel Model

An active vibration reduction system has been developed to solve pitch vibration problems of the force test models in transonic wind tunnel. The system, which uses piezoceramic actuators mounted into the active adapter at the sting top with balance signal as input and velocity feedback algorithm, can suppress the model vibration in an actively controlled way by exploiting the resonance properties of the model/balance/sting system. Ground test results show that the active vibration reduction system increases the first-order and second-order damping ratios of the model/balance/support system by 20.8 times and 12.8 times respectively. It is shown that vibration amplitude of normal force and pitching moment decreased by 71.0% and 57.5% respectively in wind tunnel test results. The wind tunnel test results also reveal that the active vibration reduction system has relatively little influence on the aerodynamic coefficient. In addition, the active vibration reduction system has also been verified in wind tunnel tests of multiple models, showing good vibration reduction performance and model adaptability.