A Multiresolution Technique-Based Gliding Vehicle Trajectory Optimization Algorithm
Liu Jian-xia · Journal of Astronautics · 2010
The trajectory optimization problem of a gliding vehicle ia researched in this paper.A dynamics model including the Earth rotation and the J2 term perturbation is used to optimize the design,and the accurate atmospheric model is adopted.In the light of the strong nonlinearity and various constraint characteristics of trajectory optimization,traditional trajectory optimization technique is sensitive to the initial guess and it is hard to deal with constraints such as way point and so on;based on a simple and intuitive method to balance conflicting objectives such as accuracy of the solution,convergence,and speed of computation,a grid adaptive-based multiresolution technique is applied to the trajectory optimization of the gliding vehicle,and a corresponding strategy dealing with the state constraints is suggested.A practical trajectory optimization application including way point,prohibited areas and terminal constraints is presented.Numerical simulation indicates that optimizing a 12400 km range gliding trajectory satisfing all constraints costs about 200 seconds on a desktop computer,which proves high efficiency of the algorithm.