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Recent developments in the aeroelasticity of morphing aircraft
Progress in Aerospace Sciences ( IF 9.6 ) Pub Date : 2021-01-01 , DOI: 10.1016/j.paerosci.2020.100682
Rafic M. Ajaj , Muhammed S. Parancheerivilakkathil , Mohammadreza Amoozgar , Michael I. Friswell , Wesley J. Cantwell

Abstract This paper presents an extensive review of the developments in the aeroelasticity of morphing aircraft that occurred in the last decade (from 2009 to 2020). It focuses mainly on fixed-wing aircraft and highlights some representative examples from rotary-wing aircraft. Morphing wings are usually associated with significant changes in the aerodynamic loads, structural/elastic properties, and inertial properties and hence the aeroelastic behavior. Changes in aeroelastic behavior can also affect the flight dynamics, stability, and control of air-vehicles. The main motivation for this paper is the fact that it is not fully possible to assess and quantify the benefits of morphing technologies without accounting for aeroelastic effects. The literature on the aeroelasticity of morphing aircraft can be split into two main themes: Aeroelastic Stability and Aeroelastic Control. The first theme (Aeroelastic Stability) includes studies conducted on morphing concepts to ensure that they satisfy certain aeroelastic requirements/constraints and that such requirements/constraints do not limit the potential benefits of morphing. The second theme (Aeroelastic Control) includes studies that utilized morphing technologies to improve aeroelastic characteristics and/or control flight loads. It is evident that in both themes, the aeroelasticity of morphing aircraft has been analyzed using analytical, numerical, and/or computational tools with a very limited number of wind-tunnel and/or flight tests. In this paper, research activities and studies are categorized according to the morphing degree of freedom they address. For each degree of freedom, research activities are arranged according to the theme they fit under. Aeroelastic frameworks developed for generic morphing applications are also reviewed. In addition, the aeroelastic models used are highlighted and discussed. Finally, trends and research gaps are identified and discussed and main conclusions are drawn.

中文翻译:

变形飞机气动弹性的最新进展

摘要 本文对过去十年(从 2009 年到 2020 年)发生的变形飞机气动弹性的发展进行了广泛的回顾。它主要关注固定翼飞机,并重点介绍了旋翼飞机的一些代表性例子。变形机翼通常与气动载荷、结构/弹性特性和惯性特性的显着变化有关,因此也与气动弹性行为有关。气动弹性行为的变化也会影响飞行器的飞行动力学、稳定性和控制。本文的主要动机是,在不考虑气动弹性效应的情况下,不可能完全评估和量化变形技术的好处。关于变形飞机气动弹性的文献可以分为两个主题:气动弹性稳定性和气动弹性控制。第一个主题(气动弹性稳定性)包括对变形概念进行的研究,以确保它们满足某些气动弹性要求/约束​​,并且这些要求/约束​​不会限制变形的潜在好处。第二个主题(气动弹性控制)包括利用变形技术改善气动弹性特性和/或控制飞行载荷的研究。很明显,在这两个主题中,变形飞机的气动弹性已经使用分析、数值和/或计算工具进行了分析,并进行了非常有限的风洞和/或飞行测试。在本文中,研究活动和研究根据它们所涉及的变形自由度进行分类。对于每个自由度,研究活动是根据他们适合的主题安排的。还审查了为通用变形应用程序开发的气动弹性框架。此外,还强调并讨论了所使用的气动弹性模型。最后,确定和讨论趋势和研究差距,并得出主要结论。
更新日期:2021-01-01
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