On-line Route Planning of Glide Phase for Hypersonic Cruise Vehicle
Shen Hai-bing · Jisuanji fangzhen · 2009
In order to satisfy the demand of the on-line route planning of glide phase for hypersonic cruise vehicle,this paper proposes a fast trajectory optimization approach.Firstly,making use of the theory of hierarchical planning based on the equations of motion,the algorithm generates a safe corridor according to the constraints of trajectory and quasi-equilibrium.Secondly,a reference trajectory can be found in the safe corridor according to the constraints of terminal and the principle of middle-line.Then an optimized trajectory can be achieved after optimizing the reference trajectory by the PRP(Polak-Ribiere-Polyak)conjugate gradient method based on the control sequence.Finally,the simulations of maximum-range and time-shortest trajectory are demonstrated.The results of the simulation verify that the planned route can satisfy flight demands of the glide phase.This method has the advantages of high efficiency and strong stability,which can satisfy the requirements of on-line vehicle route planning.