School of Transportation Science and Engineering, Beihang University, 100191 Beijing, People's Republic of China.
Bioinspir Biomim. 2021 Oct 25;16(6). doi: 10.1088/1748-3190/ac290b.
Lightweight design is key to high efficiency and long durability of micro air vehicle (MAV), while it will inevitably reduce the stiffness of the structures and affect the motion of the mechanism. In this study, an elastodynamic model for flapping-wing MAV (FMAV) is established to unveil the effect of elastic deformation of transmission mechanism on the flapping motion. Based on kineto-elastostatic analysis, an elastodynamic model of the transmission mechanism is built, which reveals that the inertial force of the transmission mechanism for typical FMAV is much smaller than the force transmitted. Thus, the inertial force can be ignored, and analytical formula between the deformation of transmission mechanism and the flapping angle is derived. Finite element method (FEM) simulations are conducted to validate the analytical formula, and the results show that the flapping angle obtained from the analytical formula matches well with FEM simulations. The proposed elastodynamic model and analytical formula will provide theoretical guidance for designing and optimizing FMAV with desired transmission mechanism and flapping motion.
轻量化设计是提高微型飞行器 (MAV) 效率和耐久性的关键，但这不可避免地会降低结构的刚度并影响机构的运动。本研究建立了扑翼微型飞行器 (FMAV) 的弹性动力学模型，以揭示传动机构的弹性变形对扑翼运动的影响。基于运动弹性静力学分析，建立了传动机构的弹性动力学模型，揭示了典型 FMAV 传动机构的惯性力远小于传递的力。因此，可以忽略惯性力，并推导出传动机构变形与扑翼角度之间的解析公式。通过有限元方法 (FEM) 模拟验证了解析公式，结果表明，解析公式得到的扑翼角度与 FEM 模拟吻合较好。所提出的弹性动力学模型和解析公式将为设计和优化具有期望传动机构和扑翼运动的 FMAV 提供理论指导。
