Discrete-Time Angle Constraint Interception with Model-Assisted Target Maneuver Estimator

Abstract EN

This paper investigates the problem of designing angle constraint guidance law against unknown maneuvering targets based on discrete-time sliding mode control theory.

Invoking the fact that the future course of action of the target, an independent entity, cannot be predicted beforehand due to its complexity and unpredictability, a model-assisted discrete-time disturbance observer in cooperation with a singularity-free strategy is proposed first to estimate the target maneuver.

Based on the reconstructed signal and a fast convergence time-varying sliding surface, a new chattering-mitigated super-twisting-like discrete-time impact angle constraint guidance law is then synthesized.

Stability analysis shows that the closed-loop system trajectory can be forced to enter into a small region around the sliding surface.

Simulations and comparisons with classical discrete-time sliding mode guidance law validate the effectiveness of the proposed guidance law.