Abstract:

Modelling of a microburst is significant for flight simulations. The parameters selection of the multiple vortex ring model of microburst is treated as an optimization problem, and the differential evolution algorithm is introduced into it. In the process of selecting the parameters by the proportion between maximal horizontal velocity and maximal vertical velocity, two interrelated optimization processes are included. Therefore, the standard differential evolution algorithm is improved. A nested differential evolution algorithm is proposed to complete the two optimization processes, objective optimization and intermediate optimization. The simulation results show that this method can flexibly generate microburst with any proportion between maximal horizontal velocity and maximal vertical velocity, and the error between factual proportion and the setting proportion can meet the requirement set by the user.