Aerodynamic, Structures And Energy Coupled Multi-objecitve Optimization For Solar Powered UAV’s Wing

The topic of this paper is based on the development status and development trend of solar UAVs, modeling in the disciplines of the Aerodynamic, structure and solar energy of the solar powered UAV’s wing. Because of the design of the traditional serial wing do not consider the relationship among the various subjects, in order to change this defect, this paper studied the multi-objective optimization design of the solar powered UAV’s aerodynamic, structure and solar discipline. The main contents are as follows:(1) Through the investigation and study on the history and current situation of domestic and foreign solar powered UAV. We understand the development trend and key technology, it is the basis of the research.(2) In this paper, we use the two-dimensional airfoil parameter method to fit the airfoil and makes it realize the parameterization. We use the UG software to realize the further-development of the 3D airfoil, and realize the 3D airfoil’s parametric modeling and automatic updates. It is convenient for the follow-up work.(3) This paper introduces the commonly used methods for aerodynamic analysis, using computational fluid dynamics(CFD) method for the solar powered UAV’s wing to build a high precision pneumatic subject analysis model.(4) This paper establishes the sun illumination model and the solar battery component model, we estimate the power of the solar powered UAV’s wing and analyze the power of the solar powered UAV under different conditions.(5) In this paper, we analyzes the solar powered UAV’s wing aerodynamic and structural coupling problems. We set up the computational fluid dynamics(CFD) analysis model and the finite element analysis(FEA) model and analyze the aerodynamic and structural coupling problems of the wing, with the displacement’s iterative error to determine the coupling convergence criteria. Finally, we get the real load and the actual deformation of the elastic equilibrium.(6) We use surrogate model technology to construct approximate mathematical model which is similar to the original structure analysis model, it is used for the purpose of optimization design. This paper uses the Kriging model and the physical programming method for the multi-objective problem into single objective problem, and then complete the wing of the solar powered UAV’s aerodynamic, structure and energy of multi objective optimization design, and finally increase the performance of the UAV.