A approach was proposed to solve multi-phase trajectory optimization problem. The approach allowed the trajectory for hypersonic vehicle in vertical plane dividing into several phase, then obtained the multi-phase trajectory optimal value by collaborative optimization method. Only the transitional phase, gliding phase and descending phase were investigated. The expectation was that the terminal velocity maximum in transitional phase, the range maximum in gliding phase and the flight time minimum in descending phase. The three phase was regarded as three discipline, and the attack angle and initial condition were as input and terminal condition as output for every discipline. The collaborative optimization software coplatform was developed to solve the multi-phase trajectory problem. The result is identical with the one obtained by all in one method or globle sensitivity equation(GSE) method. It also shows the collaborative optimization method is effective to solve the multi-phase trajectory problem.
Chuang C H, Morimoto H. Periodic optimal cruise for a hypersonic vehicle with constrains[J].Journal of Spacecraft and Rockets.1997, 34(2):165-171
Istratie V. Optimal skip entry with terminal maximum velocity and heat constraint . AIAA-98-2457,1998
�ܺ�,����,������. �߳����ٷ��������к����Ż�[J]. �������պ����ѧѧ��,2006,32(5):513-518 Zhou Hao,Chen Wanchun,Yin Xingliang. Optimization of glide trajectory for a hypersonic vehicle[J]. Journal of Beijing University of Aeronautics and Astronautics,2006, 32(5): 513-518 (in Chinese)
�ܺ�,���,����,��.�߳����ٻ������������ε����Ż�[J].�ѧ��,2006,27(5):970-973 Zhou Hao,Zhou Tao,Chen Wanchun,et al. Trajectory optimization in injection phase for hypersonic gliding vehicel[J].Journal of Astronautics,2006,27(5):970-973(in Chinese)
Gath Peter F. CAMTOS-A software suite combining direct and indirect trajectory optimization methods . Stuttgart: Institute of Flight Mechanics and Control,University of Stuttgart, 2002
Sobieski J S. Aircraft design using collaborative optimization . AIAA-96-0715,1996