For the dynamic characteristics of the lift-type reentry initial descent stage,this paper proposes three guidance methods which apply to different mission scenarios.The first is the fixed bank angle method,which combi...For the dynamic characteristics of the lift-type reentry initial descent stage,this paper proposes three guidance methods which apply to different mission scenarios.The first is the fixed bank angle method,which combines the coordinated work of orbit control and the optimal selection of the reentry initial conditions to complete the task.The second is an offline design online lookup method,which obtains the optimal bank angle command by interpolating according to the speed and track inclination signal at the entry initial point.The third is an online search for the bank angle method,which quickly solves the dynamics equation online and searches for the optimal initial descent flight bank angle that matches the reentry condition as a guidance command.The perturbation adaptability and mission adaptability of the three methods are simulated and verified.The results show that the three methods have certain applicable scenarios of the initial descent stage guidance task.展开更多
文摘For the dynamic characteristics of the lift-type reentry initial descent stage,this paper proposes three guidance methods which apply to different mission scenarios.The first is the fixed bank angle method,which combines the coordinated work of orbit control and the optimal selection of the reentry initial conditions to complete the task.The second is an offline design online lookup method,which obtains the optimal bank angle command by interpolating according to the speed and track inclination signal at the entry initial point.The third is an online search for the bank angle method,which quickly solves the dynamics equation online and searches for the optimal initial descent flight bank angle that matches the reentry condition as a guidance command.The perturbation adaptability and mission adaptability of the three methods are simulated and verified.The results show that the three methods have certain applicable scenarios of the initial descent stage guidance task.
