Terminal Time Constrained Guidance Against Stationary Target With Bounded Input and Rate

This paper presents a nonlinear guidance scheme to address the problem of achieving precise target interception at a desired impact time against stationary targets in a three-dimensional setting. Unlike most existing approaches that assume the interceptor to possess unbounded control, the proposed guidance design explicitly incorporates both magnitude and rate constraints (physical bounds) of the interceptor’s actuators into the guidance law. This approach makes the guidance law more applicable to real-world scenarios. By including actuator constraints in the design, the overall effectiveness of the interceptor is enhanced. The proposed method utilizes an input-affine magnitude and rate saturation (MRS) model to effectively enforce these constraints. Guidance commands are derived by integrating the MRS model into the kinematics and are validated through performing simulations under various engagement scenarios.