Modular design and finite element analysis of quadrotor agricultural UAV
In order to further improve the upgrading,assembly and maintenance efficiency of quadrotor agricultural UAVs and expand the application scope of agricultural UAVs,a modular design method for agricultural UAVs is proposed.Firstly,the correlation between any parts in the quadrotor agricultural UAV at the level of connection fixation,function and geometric parameters is comprehensively analyzed,the part relationship diagram is constructed,the highly correlated parts are clustered into parts,and the correlation matrix of the parts at each level is calculated.Secondly,using the AHP to give different weights to each level,calculate the comprehensive strength correlation matrix between components,and merge parts according to the module evaluation principle.Finally,the module structure is established,the corresponding modules are combined according to the job requirements,and the static and dynamic characteristics of the key functional modules are analyzed.The results show that:This modular design method simplifies 28 drone parts into 6 independent modules.When the UAV is updated,only the corresponding changed modules need to be redesigned and manufactured.The independence of the module simplifies the assembly process and reduces the maintenance cost.The 6 modules can be combined into spraying drones or spreading drones,so that drones are not only suitable for pesticide spraying,but also for seed and fertilizer sowing.Through the finite element analysis of the central cabin module,its maximum stress is 23.889 MPa,which is much smaller than the maximum tensile strength of carbon fiber 4 780 MPa,the natural frequency of the first four orders is greater than the maximum frequency of 32.75 Hz when the UAV is working,and its maximum morphological variable is 0.004 635 9 mm,which meets the deformation requirements under the extreme working conditions of the UAV.
agricultural UAVmodular approachquadrotor correlation matrixstatic and dynamic analysis
万方数据
维普
