On-board trajectory reconfiguration and dynamic inverse tracking control for RLV

A dynamic inverse tracking control law of nominal trajectory for Reusable Launch Vehicle re-entry is designed based on on-board trajectory reconfiguration strategy. The closed-loop analytical solution is modified to improve both accuracy and rapidity of on-board trajectory generation algorithm. The r-V profile obtained by on-board trajectory generation is transformed into D-V profile for tracking. The nominal trajectory is regenerated and updated on line to eliminate the flight range error. A dynamic inverse tracking control law is designed while an integration element is introduced to eliminate the steady-state error. The nominal trajectory can be tracked precisely and the tracking error has global convergence. The numerical simulation shows that the proposed tracking control law has good tracking performance and the guidance system has adaptability to different re-entry missions.