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Adaptive blade Twist-calculations and experimental results

机译:自适应叶片扭曲计算和实验结果

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摘要

Applying adaptronics to helicopters has a high potential to significantly suppress noise, reduce vibration, and increase the overall aerodynamic efficiency. This paper presents recent investigations o a very promising specific concept described as Adaptive Blade Twist (ABT). This concept allows us to directly control the twist of the helicopter blades by smart adaptive elements. This influences positively the main rotor area which is the primary source for helicopter noise and vibration. Since the interaction of non-stationary helicopter aerodynamics and elastomechanical structural characteristics f the helicopter blades causes flight envelope limitations, vibration and noise, a good comprehension of the aerodynamics is essential for the development of structural solutions to effectively influence the local airflow conditions and finally develop the structural concept. With respect to these considerations, the ABT concept will be presented.
机译:在直升机上使用自适应技术具有很大的潜力,可以显着抑制噪声,减少振动并提高整体空气动力学效率。本文介绍了最近的研究,这是一个非常有前途的特定概念,称为自适应刀片扭曲(ABT)。这个概念使我们能够通过智能自适应元件直接控制直升机叶片的扭曲。这会对主旋翼区域产生积极影响,而主旋翼区域是直升机噪声和振动的主要来源。由于直升机的非平稳直升机空气动力学和弹性机械结构特性的相互作用会引起飞行包络线限制,振动和噪声,因此对空气动力学的良好理解对于开发有效影响当地气流条件并最终发展的结构解决方案至关重要结构概念。关于这些考虑,将提出ABT概念。

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