基于IAFSA的四自由度翼伞分段归航设计

为实现翼伞系统的精确空投,需要对其归航轨迹作合理规划。根据翼伞系统自身的运动特性及操纵特性,采用分段归航策略。在四自由度翼伞模型下,利用各轨迹段的几何关系,建立表征轨迹优劣程度的目标函数。基于改进的人工鱼群算法,对目标函数进行参数寻优,进而得到轨迹的设计参数。仿真结果表明,所提出的改进方法能加快算法的收敛速度,所规划的轨迹满足了精确落点和逆风着陆的要求。

Design in Multiphase Homing of 4-DOF Parafoil System Based on Improved Artificial Fish-Swarm Algorithm

In order to implement the precise airdrop of parafoil system,the homing trajectory shoule be planned rationally. Multiphase homing trajectory is adopted according to the motion characteristics and handling characteristics of parafoil system. Based on the four degree of freedom model,objective function which can be used to evaluate trajectories is established by using the geometrical relationship of each trajectory segment. Getting the global optimal solution of the objective function by means of improved Artificial fish swarm algorithm,then the design parameters of the trajectory are obtained. The simulation results show that this improved method can accelerate the convergence speed of the algorithm,and the planning trajectory meet the demands of precise airdrop and upwind landing.