Six-DOF trajectory optimization for reusable launch vehicles via Gauss pseudospectral method

摘要: To be close to the practical flight process and increase precision of optimal trajectory, a six-degree-of-freedom (6-DOF) trajectory is optimized for reusable launch vehicle (RLV) using Gauss pseudospectral method (GPM). Different from traditional optimization problem which generally considers RLV as point mass, coupling between translational dynamics rotational taken into account. An formulated minimize performance index subject 6-DOF equations motion, including dynamics. A two-step strategy then introduced reduce large calculations caused by multiple variables convergence confinement in optimization. The simulation results demonstrate that feasible.