Bounded Input and Field-of-view Constrained Impact Time Guidance

This paper proposes a novel nonlinear guidance scheme tailored for intercepting stationary targets precisely at a desired impact time in a planar engagement scenario. The strategy addresses the challenges posed by the bounded field-of-view of seeker-equipped interceptors and physical actuator constraints, which can degrade the performance if unaccounted for. By integrating known actuator bounds directly into the design, the proposed guidance scheme enhances the overall effectiveness of the interceptor. The proposed approach employs an input-affine acceleration saturation model within the autopilot to handle the input constraints effectively. The acceleration model is appended to the kinematic equations to derive the guidance command. The seeker’s field-of-view limitation is incorporated by utilizing the backstepping concepts using heading angle. The efficacy of the proposed strategies is demonstrated through comprehensive numerical simulations across various scenarios and compared against an existing guidance strategy.