Single moving-mass asymmetrical reentry vehicle guidance law design

By analyzing predictor-corrector method, a modified guidance law is designed for single moving-mass asymmetrical reentry vehicle. It could guarantee a relatively high precision while the requirements for computational efficiency of calculator in the vehicle is low. Principles of the predictor-corrector method are analyzed in detailed and the problems which need to be solved when applied to the asymmetrical reentry vehicle are indicated. A modified strategy is put forward to deal with the problems. When the altitude of the trajectory is relatively high, the predictor-corrector method is adopted and the constraints of the precision in the end of the predictor-corrector part of the whole trajectory are relaxed. When parameter Ω > 1, the modified method can be adopted for the end of the whole trajectory. The simulation results show that the modified guidance law could satisfy the constraints of computational efficiency and guarantee a high precision at the same time.