Wang Sicong, Xu Shuhong, Lu Lei, Sun Lining
School of Mechanical and Electrical Engineering, Soochow University, Suzhou 215137, China.
School of Engineering, Applied Technology Collage of Soochow University, Suzhou 215325, China.
Polymers (Basel). 2023 May 25;15(11):2455. doi: 10.3390/polym15112455.
Deployable extendable booms are widely used in aerospace technology due to many advantages they have, such as high folded-ratio, lightweight and self-deployable properties. A bistable FRP composite boom can not only extend its tip outwards with a corresponding rotation speed on the hub, but can also drive the hub rolling outwards with a fixed boom tip, which is commonly called roll-out deployment. In a bistable boom's roll-out deployment process, the second stability can keep the coiled section from chaos without introducing a controlling mechanism. Because of this, the boom's roll-out deployment velocity is not under control, and a high moving speed at the end will give the structure a big impact. Therefore, predicting the velocity in this whole deployment process is necessary to be researched. This paper aims to analyze the roll-out deployment process of a bistable FRP composite tape-spring boom. First, based on the Classical Laminate Theory, a dynamic analytical model of a bistable boom is established through the energy method. Afterwards, an experiment is introduced to produce some practical verification for comparison with the analytical results. According to the comparison with the experiment, the analytical model is verified for predicting the deployment velocity when the boom is relatively short, which can cover most booms using CubeSats. Finally, a parametric study reveals the relationship between the boom properties and the deployment behaviors. The research of this paper will give some guidance to the design of a composite roll-out deployable boom.
可展开可延伸的起重臂因其具有许多优点，如高折叠比、轻质和自展开特性等，而在航空航天技术中得到广泛应用。双稳态纤维增强复合材料起重臂不仅能以相应的转速在轮毂上向外延伸其端部，还能在起重臂端部固定的情况下驱动轮毂向外滚动，这通常被称为展开式部署。在双稳态起重臂的展开式部署过程中，第二稳定性可以在不引入控制机制的情况下防止盘绕部分出现混乱。正因为如此，起重臂的展开式部署速度不受控制，而在末端的高移动速度会给结构带来很大冲击。因此，研究预测整个部署过程中的速度是很有必要的。本文旨在分析双稳态纤维增强复合材料带状弹簧起重臂的展开式部署过程。首先，基于经典层合板理论，通过能量法建立双稳态起重臂的动力学分析模型。之后，引入一个实验进行一些实际验证，以便与分析结果进行比较。根据与实验的比较，验证了该分析模型在起重臂相对较短时预测部署速度的有效性，这可以涵盖大多数使用立方星的起重臂。最后，参数研究揭示了起重臂特性与部署行为之间的关系。本文的研究将为复合展开式可部署起重臂的设计提供一些指导。
