Profile Tracking Control of Reentry Vehicle With Input-constrained Backstepping Sliding Mode Controller

In view of the reentry glide phase guidance problem of hypersonic vehicles, this paper proposes a profile tracking control method based on input-constrained backstepping sliding mode controller (BSMC). First, the multiple path constraints of gliding phase are transformed into the reentry corridor in the drag acceleration-velocity (D-V) profile. A standard profile is designed in the form of a quadratic function, and the function coefficients are optimized by the intelligent algorithm. Based on the second-order differential model of drag acceleration and velocity, an input-constrained BSMC is designed by using the auxiliary system to obtain the control commands required for the longitudinal motion of vehicle. Finally, the tracking performance of the control scheme is verified by numerical simulation of reentry gliding phase.