Impact time and angle control guidance independent of time-to-go prediction

Abstract

A novel cruise guidance method that can meet the terminal latitude and longitude, time and angle constraints independent of time-to-go prediction is studied in this paper. The impact time and angle control guidance (ITACG) goal is achieved through two steps. The first step is the construction of the complete motion model, the constant altitude and velocity guidance laws, and the optimal proportional guidance law which can satisfy the terminal position constraint based on the in-plane relative motion equation. The impact time control is the second step, which can be achieved by the integrated utilization of optimal guidance and maneuvering flight. Additional maneuvering trajectories used to control the impact time are designed in both cases with and without angle constraint, and the maneuvering parameters are directly solved online without time-to-go prediction. Simulation results verify the effectiveness of the guidance method, as well as the adaptability to different initial conditions and terminal constraints.