Overall design and sensitivity analysis of solar aircraft based on feasible region planning method

Solar aircraft has the ability of 24-hour uninterrupted cruise, so it has become a research hotspot all over the world. The existing overall design method of solar aircraft generally obtains the design scheme through the iterative operation of the balance equations. However, the overall parameters satisfying the boundary conditions are not unique, but distributed in a specific interval. This paper presents a method to construct the radial feasible region of the overall parameters based on the balance equations, and studies the sensitivity of the feasible region to the task indicators and performance indicators respectively, which provides suggestions for the optimization direction of the subsystem in the overall design stage. Finally, based on the above methods and research conclusions, the design scheme of a 15m wingspan solar aircraft is introduced. This paper provides an intuitive overall design method for solar aircraft, and offers scientific basis for multidisciplinary collaborative optimization.