Research On Reentry Guidance And Control Method Of Crew Return Vechicle

According to the requirement of space vehicle, this paper develops the research on the crew return vehicle(CRV) guidance and control technology, and develops the software platform of the six dimension system, and analyzes the whole process guidance precision of CRV. The research situation is as follows:Research on reentry guidance technology based on nominal trajectory tracking: Research and analysis of reentry guidance technology and nominal trajectory tracking guidance technology research status. Based on the quasi equilibrium glide condition nominal trajectory tracking guidance scheme, gives the guidance method detailed algorithm principle, including reentry corridor generation, trajectory planning, LQR longitudinal guidance law and based on the heading error corridor of the lateral guidance law. And the completion of three dimension s imulation and Monte Carlo simulation of single interference verification is given.Design of combined control law of RCS and air rudder: In view of the serious problem of large maneuvering angle flight and three channel coupling in the reentry process of CRV reentry vehicle, the control system design method based on nonlinear dynamic inverse control law is adopted. RCS control strategy based on RCS layout features by using time sequence control. Completion of guidance and control joint simulation.Research on the framework of CRV system verification platform: Using GUIDE/Simulink/M Matlab language to build six dimensional software platform. And the platform set tool error, the method error and deviation of the reentry process guidance precision analysis.