Lateral reentry guidance for maneuver glide vehicles with geographic constraints

A new lateral reentry guidance method for maneuver glide vehicles is presented specially to satisfy the geographic constraints. Different entry trajectory constraints including the common path constraints and the geographic constraints are considered, and a guidance strategy is developed. The conventional linear quadratic regulator (LQR) is used to track the longitudinal profiles. A lateral guidance algorithm based on target prediction is studied for the mission of matching waypoints. With the target's cross range error, the reversal logic and fine adjustment method of bank angle are designed. According to the mission of avoiding no-fly zones, a lateral guidance algorithm with on-line designed dynamic heading error corridor is presented. Simulation in nominal case indicates that the geographic and other constraints can be satisfied with only 5 bank reversals. The Monte Carlo simulations are taken for the distribution of initial condition and aerodynamic dispersions. The lateral guidance provides good performance cooperated with the longitudinal guidance, and has a perfect interference capacity for the disturbance.