Trajectory Planning for the Powered Parafoil at Insufficient Height

According to the flight characteristics of the powered parafoil, the thought of multi-phase design of the traditional parafoil system is used for the trajectory planning of the powered parafoil. On the basis of the three phases of the traditional parafoil system homing, the phase of task execution is added to the homing trajectory according to the working condition. The problem of trajectory planning is transformed to parameter optimizing on the basis of geometric relationship of each phase trajectory. The situation that the initial height is too low that the powered parafoil cannot fly to the target point is also considered. Applying the Quantum genetic algorithm (QGA) to calculate the objective function, the design parameters of the whole homing trajectory are obtained. The simulation results show that the multi-phase homing is simple and practical, and can meet the requirement of landing point precision.