Terminal Guidance Law Design Considering Seeker SAR Imaging and Field of View Constraint

The terminal guidance flight process of aircraft is influenced by complex constraints. To address the operational requirements of active radar and infrared seekers, a specialized guidance law has been developed. This guidance law is designed to meet the constraints related to the terminal landing angle, the Synthetic Aperture Radar (SAR) imaging motion, and the field angle of the composite seeker simultaneously. The proposed method is based on a two-channel optimal guidance law that incorporates the terminal landing angle constraint. In the lateral channel, a forward bevel angle command tracking guidance law is introduced, and a field boundary correction term is added in the terminal guidance phase to satisfy the field angle constraint. Numerical simulation results demonstrate that the guidance law effectively meets the SAR imaging constraints and performs well in maintaining the field of view constraints of the seeker, even in the presence of disturbances.