Predictor-corrector entry guidance for high-lifting hypersonic vehicles

Abstract

An effective predictor-corrector guidance algorithm of high-lifting vehicles is presented in this paper. For the convenience of designing the bank angle profile, the path constraints are transformed into the constraints of the bank angle by using the quasi-equilibrium glide condition (QEGC). The differential equations of motion and range-to-go of hypersonic vehicle are used to predict the terminal target point. The main problem of the guidance of high-lifting vehicles is the bounces of vehicle in the trajectory. For suppressing the trajectory oscillations caused by their high ratio of lift and drag in the guidance, the current bank angle, which is calculated from the predictor-corrector guidance approach, will be improved by the reference flight path angle. What is more, a method is presented to correct the terminal bank angle. Simulations are provided to verify the effectiveness of the proposed method.