Novel Aeroservoelastic Stability Analysis and Augmentation Framework: Application to Next-Generation Flexible Aerial Platforms

新型气动伺服弹性稳定性分析和增强框架：在下一代柔性空中平台中的应用

• 批准号: RGPIN-2020-06318
• 负责人: KHOULI, FIDEL
• 金额: $ 1.68万
• 依托单位: Carleton University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=717752
• 关键词: Novel; Aeroservoelastic; Stability; Analysis; Augmentation

Next-generation autonomous and commercial aerial vehicles will operate in challenging flight regimes, utilize lightweight and flexible airframes and possess new topological forms that will lead to superior performance and lower environmental footprint. However, the high flexibility of the airframe will give rise to aerodynamics-stabilizing control laws-structural interactions abbreviated as Aero-Servo-Elasticity. Aeroservoelastic instabilities, which also encompass the aeroelastic ones, are known to plague flexible airframes. Without proper understanding and mitigation strategies, these instabilities will prevent the deployment of aerial vehicles with otherwise superior performance and lower environmental footprint. The development of a novel aeroservoelastic stability analysis and augmentation framework that will be used in the design and the optimization of next-generation flexible aerial platforms is the principal goal of the proposed research program. Target applications of the proposed novel framework in the next five years are Tailless Bio-inspired Micro-Air-Vehicles (TBMAVs) and Unconventional Flexible Aircraft (UFA). Both platforms share challenging aeroservoelastic problems that are rooted in the high flexibility of their airframe. These are manifested as static and dynamic instabilities that may lead to degradation of handling and control qualities, airframe vibration or complete loss of the aerial platform. It is emphasized that the proposed novel framework is encompassing and applicable to other next-generation flexible aerial platforms such as rotary-wing and urban air taxis, which will be addressed by the research program in the long term as it evolves. TBMAVs and UFA offer several performance and environmental advantages when compared to other aerial platforms and they are being considered for autonomous surveillance and future-commercial aircraft respectively. The proposed framework will introduce novel reduced-order-modelling techniques, which is an essential step that precedes aeroelastic and aeroservoelastic analyses, and develop models that will be used to investigate aeroservoelastic instabilities and suggested mitigation strategies. The research program will utilize the developed framework to be the first to rigorously investigate the aeroservoelastic stability of TBMAVs and assess novel passive and active strategies to mitigate known aeroelastic and aeroservoelastic instabilities intrinsic to UFA. Through training of HQP, engagement with aerospace companies and dissemination of research outcomes in open journal publications, the research program will address the urgent needs of the vital aerospace sector in Canada.

下一代自主和商用飞行器将在具有挑战性的飞行状态下运行，采用轻质和灵活的机身，并具有新的拓扑形式，这将导致上级性能和更低的环境足迹。然而，机体的高度柔性将引起气动-稳定控制律-结构相互作用，简称为气动伺服弹性。气动伺服弹性不稳定性，也包括气动弹性不稳定性，是众所周知的困扰柔性机身。如果没有适当的理解和缓解策略，这些不稳定性将阻止部署具有其他上级性能和较低环境足迹的飞行器。开发一种新的气动伺服弹性稳定性分析和增强框架，将用于下一代柔性空中平台的设计和优化，是拟议研究计划的主要目标。 在未来五年内，所提出的新框架的目标应用是无尾仿生微型飞行器（TBMAVs）和非常规柔性飞机（乌法）。这两种平台都面临着具有挑战性的气动伺服弹性问题，这些问题根源于其机体的高灵活性。这些表现为静态和动态不稳定性，可能导致操纵和控制品质的降低、机身振动或空中平台的完全损失。需要强调的是，所提出的新框架涵盖并适用于其他下一代灵活的空中平台，如旋翼和城市空中出租车，随着研究计划的发展，这些问题将在长期内得到解决。与其他空中平台相比，TBMAV和乌法提供了一些性能和环境优势，它们分别被考虑用于自主监视和未来商用飞机。 拟议的框架将引入新的降阶建模技术，这是一个必不可少的步骤，气动弹性和气动伺服弹性分析之前，并开发模型，将用于调查气动伺服弹性不稳定性和建议的缓解策略。该研究计划将利用开发的框架，是第一个严格调查TBMAV的气动伺服弹性稳定性和评估新的被动和主动战略，以减轻已知的气动弹性和气动伺服弹性固有的乌法的不稳定性。 通过HQP的培训，与航空航天公司的合作以及在公开期刊出版物中传播研究成果，该研究计划将满足加拿大重要航空航天部门的迫切需求。