四旋翼植保无人机机臂折叠机构轻量化设计

Lightweight Design of Arm Folding Mechanism of Quad-rotor Plant Protection UAV

为了更好地实现农业无人机整机的轻量化,以某四旋翼植保无人机机臂折叠机构为对象展开研究。首先,依据机臂折叠机构的工作原理、结构特征和载荷状况,建立了机臂折叠机构的三维模型;其次,在对机臂折叠机构进行静力学分析和模态分析的基础上,以质量优化为目标,将未受力部分设计为优化区,并对其进行拓扑优化;最后,通过对优化结果的分析,在UG三维建模软件中重建实体模型,并再次进行静力学分析和模态分析,验证优化后的机臂折叠机构是否满足四旋翼植保无人机在实际工作中的静动态特性要求。研究结果表明:优化后机臂折叠机构的质量由最初的231.54g减少至204.21g,无人机整机总质量降低了109.32g,且优化后的机臂折叠结构在减轻质量的同时提升了结构的整体性能。

In order to better realize the lightweight design of the quadcopter plant protection drone,this article focuses on the arm folding mechanism of the quadcopter plant protection drone,develops the arm folding mechanism according to the working principle,characteristics structural and loading conditions,and established a 3D model of the arm folding mechanism.Based on a static and modal analysis of the arm bending mechanism,an optimization of the topology of the unconstrained part of the arm bending mechanism is performed with the aim of optimizing the quality.Through the analysis of the optimization results,we redesigned the new arm folding mechanism and redid the static and modal analysis to ensure the safety and reliability of the arm folding mechanism.The results show that the weight of the arm folding mechanism has been reduced from the initial 231.54 grams to 204.21 grams,and the total weight of the quadcopter plant protection drone has been reduced by 109.32 grams.The strength and rigidity of the new arm folding mechanism,allows the gravity limit and the mechanism does not resonate during operation.