电流变液在飞机操纵面颤振半主动控制中的应用研究

On Semi-Active Aircraft Flutter Control by ER Fluid Damping Pivot

利用电流变液这种智能材料的物理效应及力学性能 ,根据可控阻尼介质的特殊应用要求 ,研制出一种零电场低粘度且可控粘度变化范围较大的电流变液。并设计制作了一种多层滑动极板式阻尼铰 ,将其用于机翼操纵面的颤振半主动控制 ,使所研究模型的颤振临界速度提高了 36.3%。研究结果表明 ,电流变阻尼器可用于机翼操纵面颤振控制研究中。

Existing methods for aircraft flutter control are based on mechanical devices. We present a method to make use of the special mechanical properties of Electro Rheological Fluid (ERF) to design a damping pivot. To our best knowledge, there is no such report in the open literature. We first developed an ER fluid whose static yield stress is 1.6kPa when the electric field intensity is 3kV/mm. Using this ER fluid, we designed a damping pivot as shown in Fig.1. Then we applied this damping pivot to the flutter control of aircraft control surface (section 3). We carried out wind tunnel tests as shown in Fig.5. Fig.6 gives the test results, and Fig.6b shows that the flutter speed is increased by 36%.