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Multidimensional Vibration Suppression Method with Piezoelectric Control for Wind Tunnel Models

机译：风洞模型的压电控制多维振动抑制方法

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摘要

In wind tunnel tests, the low-frequency and large-amplitude vibration of the cantilever sting result in poor test data in pitch plane and yaw plane, more seriously, even threatens the safety of wind tunnel tests. To ensure the test data quality, a multidimensional vibration suppression method is proposed to withstand the vibration from any direction, which is based on a system with stackable piezoelectric actuators and velocity feedback employing accelerometers. Firstly, the motion equation of the cantilever sting system is obtained by Hamilton’s principle with the assumed mode method. Then, the multidimensional active control mechanism is qualitatively analyzed and a negative velocity feedback control algorithm combined with a root mean square (RMS) evaluation method is introduced to realize active mass and active damping effect, meanwhile, a weight modification method is performed to determine the sequence number of the stacked piezoelectric actuators and the weight of control voltages in real time. Finally, a multidimensional vibration suppression system was established and verification experiments were carried out in lab and a transonic wind tunnel. The results of lab experiments indicate that the damping ratio of the system is improved more than 4.3 times and the spectrum analyses show reductions of more than 23 dB. In addition, wind tunnel test results have shown that for the working conditions (α = −4~10° with γ = 0° or α = −4~10° with γ = 45°) respectively at 0.6 Ma and 0.7 Ma, the remainder vibration is less than 1.53 g, which proves that the multidimensional vibration suppression method has the ability to resist vibration from any direction to ensure the smooth process of wind tunnel tests.
机译：在风洞测试中，悬臂梁的低频和大振幅振动会导致俯仰平面和偏航平面中的测试数据不佳，更严重的是，甚至威胁到风洞测试的安全性。为了确保测试数据的质量，提出了一种多维振动抑制方法，该方法可承受来自任何方向的振动，该方法基于具有可堆叠压电致动器和采用加速度计的速度反馈的系统。首先，利用汉密尔顿原理，采用假设模态方法，得到了悬臂式钉刺系统的运动方程。然后，对多维主动控制机制进行定性分析，引入负速度反馈控制算法与均方根（RMS）评估方法相结合，以实现主动质量和主动阻尼效果，同时，采用权重修改法来确定叠层压电致动器的顺序编号和实时控制电压权重。最后，建立了多维减振系统，并在实验室和跨音速风洞中进行了验证实验。实验结果表明，该系统的阻尼比提高了4.3倍以上，频谱分析表明降低了23 dB以上。此外，风洞测试结果表明，对于工作条件（α= -4〜10°，γ= 0°或α= −4〜10°，γ= 45°），分别在0.6 Ma和0.7 Ma下工作剩余振动小于1.53 g，这证明多维振动抑制方法具有抵抗任何方向振动的能力，从而确保风洞测试的顺利进行。

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