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首页> 外文会议>19th International conference on adaptive structures and technologies 2008 >Multistable Tape-Spring Assemblies for Morphing Aerofoil Applications
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Multistable Tape-Spring Assemblies for Morphing Aerofoil Applications

机译：用于变形翼型应用的多稳态带簧组件

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Changing the aerodynamic forces acting on an aerofoil is most commonly done by camber change using an actuated pin-jointed control surface at the trailing edge. There can be significant mass penalties with such devices and achieving a smooth camber variation is difficult. This work presents a design for an aerofoil section which has at least two stable camber geometries. The aerofoil's multistability derives from the use of a novel tape-spring assembly. A tape-spring is effectively a cylindrical shell. They possess the unusual mechanical property of being able to be folded elastically and lock when straightened. The design case considered is based on a typical helicopter main rotor blade. The multistable device is used to improve the performance of the rotor blade during the transition between hover and forward flight. Force-displacement characteristics of the flap are found experimentally and compared with finite element and analytical models. Both modelling techniques are in good agreement with the manufactured demonstrator.
机译：改变作用在机翼上的空气动力通常是通过在后缘使用致动的销接头控制表面来改变外倾角来完成的。此类装置可能会遭受大量的罚款，并且很难实现平滑的外倾角变化。这项工作提出了一种至少具有两个稳定外倾几何形状的翼型截面设计。机翼的多重稳定性源于新型带状弹簧组件的使用。带状弹簧实际上是圆柱形外壳。它们具有非凡的机械性能，能够被弹性折叠并在拉直时锁定。考虑的设计案例基于典型的直升机主旋翼桨叶。多稳定装置用于在悬停和向前飞行之间的过渡过程中改善转子叶片的性能。实验发现了襟翼的力-位移特性，并与有限元和分析模型进行了比较。两种建模技术都与制造的演示器非常吻合。

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