Research on 6DOF reentry trajectory simulation for manned spaceship's return module

In order to comprehensively study and analyze the performances of the guidance navigation control (GNC) system for manned spaceship's return module, and verify the validity, rationality and feasibility of the system design, the research on 6DOF reentry trajectory simulation for the return module is proposed. According to the GNC system function and task for it, the 6DOF simulative mathematical models of reentry trajectory are formulated under the action of a variety of disturbances including wind on it. Hence, a foundation is laid for the hardware in the loop simulation. The nominal trajectory based reentry guidance law is put forward. Then, the attitude control signal parameters of the roll channel in the process of reentry total lift control are rigorously derived, and the simplifying method for the engineering application is given according to the practical situation. A comprehensive simulation software is developed. By digital simulation, some conclusions, which have important theoretical significance and engineering application values, are made.