Two-Stage Cooperative Guidance Strategy with Impact-Angle and Field-of-View Constraints

In this paper, a novel two-stage cooperative homing guidance law with impact-angle and FOV constraints for intercepting a stationary target is investigated. The design for the cooperative stage is based on a multi-agent consensus algorithm to achieve consensus on the time- to-go and the lead angle at the switching time. In the lead-angle- profile tracking stage, two different desired lead-angle profiles are presented. By nullifying the tracking error, objectives such as the terminal impact angle and salvo attack are satisfied. The FOV constraint is maintained during the two phases. The achievable impact sets are obtained analytically under different initial lead angles and limited acceleration command conditions. The remarkable contributions of the proposed approach can be summarized as follows: 1) A multiconstraint cooperative homing guidance law without parameter optimization is investigated. The FOV constraint in both phases is addressed by a constrained multi-agent consensus algorithm and lead-angle-profile tracking control theory. 2) The acceleration command becomes zero at the interception time, and the problem of a guidance command singularity is avoided when the lead angle becomes zero. 3) The achievable impact sets are obtained analytically to ensure proper selection of the desired impacts.