Three Dimensional Nonlinear Guidance Law for Exact Impact Time Control

This paper presents a nonlinear guidance law for controlling the impact time of missile-target engagement in three dimensions. The is initially formulated two-dimensional encounter before being extended to three-dimensional scenario. constructed such that kinematics are neither linearized nor approximated. offers precise closed-form expression time, which principal contribution this work. Choosing an integrable heading error profile central concept research determining accurate time. A two-step strategy utilized accomplish interception at predetermined Because control parameter related desired with exact expression, simple and attained. method provides equations calculating minimum maximum times, enabling determination range times can be achieved. proposed ensure seeker field view restriction not violated, If initial within limit. developed salvo attacks, multiple missiles simultaneously strike enemy target, increasing missiles’ effectiveness against target’s self-defense mechanism. To validate strategy, MATLAB-based numerical simulations 2D 3D engagements, including conducted.