TABLF-based finite-time cooperative guidance law for a maneuvering target with a field-of-view constraint

This paper presents a finite-time cooperative guidance approach aimed at intercepting maneuverable targets while ensuring that multiple missiles adhere to field-of-view (FOV) constraints throughout the interception process. A model for the missile–target relative motion is constructed, where the FOV constraint is redefined as an asymmetric, time-varying limit on the missile’s relative velocity perpendicular to the line-of-sight (LOS) direction. The proposed guidance method is divided into two components: one along the LOS direction and the other perpendicular to it. For the LOS direction, a multiagent consensus protocol is employed alongside a finite-time disturbance observer, ensuring that the interception timing of multiple missiles converges to a consistent value within a finite period. Perpendicular to the LOS, a finite-time guidance law is formulated using a time-varying asymmetric barrier Lyapunov function (TABLF) combined with adaptive control theory, ensuring that all missiles achieve the desired impact angle while maintaining compliance with the FOV constraints. The finite-time stability of the guidance law is validated using Lyapunov theory. Finally, the effectiveness of the cooperative guidance strategy, including FOV compliance, is demonstrated through numerical simulations.