Aims

In transonic wind tunnel tests, large-amplitude and low-frequency vibration is easily produced on the sting which is used to support the test model. In that case, the quality of the aerodynamic data obtained from the tests would dramatically deteriorate and the security of the staffs and instruments would be threatened. This paper aims at establishing a multi-modal active damping system, which can realize active vibration control of the sting used in wind tunnels.

Methods

The hardware platform of the first-two-order vibration damping system based on eight piezoelectric stacks is set up and the realtime control software is designed to verify the feasibility and practicability of the system. Evaluation of the system is carried out in a 2.4 m × 2.4 m transonic wind tunnel.

Conclusion

Using a scaled transport plane as the test model, the results show that over 80.6% reduction of the vibration amplitude and 95.6% energy elimination could be achieved by applying this damping system. The success of the system provides an effective way to tackle the harmful vibration problems in wind tunnel tests.

中文翻译：

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跨音速风洞试验多模态主动阻尼系统的试验研究

宗旨

在跨音速风洞试验中，用于支撑试验模型的支架上容易产生大振幅低频振动。在这种情况下，从测试中获得的空气动力学数据的质量将急剧恶化，人员和仪器的安全将受到威胁。本文旨在建立一种多模态主动阻尼系统，实现风洞用艉柱的主动振动控制。

方法

搭建了基于八压电堆的一二阶减振系统的硬件平台，设计了实时控制软件，验证了系统的可行性和实用性。该系统的评估是在 2.4 m × 2.4 m 跨音速风洞中进行的。

结论

以缩放传输平面作为测试模型，结果表明，应用该阻尼系统可以实现振幅降低80.6%以上，能量消除95.6%以上。该系统的成功为解决风洞试验中的有害振动问题提供了一种有效的方法。