Comparative research on tracking guidance methods for high-speed reentry vehicles
To solve the problem of standard reentry trajectory tracking guidance,comparison and study have been conducted on how to choose the control method.The standard reentry trajectory is obtained by using the Radau pseudo spectral method in accordance with the standard angle of attack scheme,process constraints and flight mission performance index.The control model of longitudinal trajectory tracking guidance is established by adopting LQR control and sliding mode control respec-tively.The tilt angle inversion strategy is employed as a lateral guidance method obtaining two traj-ectory tracking guidance controllers.The simulation results indicate that the trajectory tracking guid-ance controllers possess better robustness,which are developed based on sliding mode control with model or parameter uncertainty considered,resulting in higher success rate of simulation test.
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