Global optimization for Cross-domain aircraft based on Kriging model and par-ticle swarm optimization algorithm

Abstract

In order to further extend the working range of existed aircrafts, a new type of water-air cross-domain aircraft based on fixed-wing aircrafts with the addition of extra tandem ducted coaxial rotors and tail ducted propulsion system was herein proposed, which was driven by a hybrid power system. Due to its layout situation, the fluid characteristics underwater was especially analyzed based on CFD simulation experiments, which mainly aimed at the thrust force characteristics influenced by different layout parameters of tail ducts and different rotational velocities. In order to figure out the optimal layout which can reach the best performance underwater, a global layout optimization was accomplished with the former analysis results, which employed an optimization method based on PSO algorithm with the compensation of orthogonal test and Kriging model to decrease computational complexity and improve interpolation accuracy. The global optimal layout solution was finally obtained and validated to be reasonable through extra simulation experiments, and the proposed optimization method was also proved to be effective through the utilization for this studied case.