부산대학교 도서관

Proportional navigation (PN) is a well-known guidance law for a two-vehicle engagement. In the two-vehicle engagement, the miss distance (the closest distance between the two vehicles) is desired to be zero that can be achieved by annulling the line-of-sight (LOS) rate. The PN guidance law requires information of the LOS rate and, if it is available, the closing velocity (the relative approaching speed to the target). The PN guidance system may degrade the system performance due to target maneuvers. Such target maneuvers should be compensated with a guidance system. However, it is difficult to obtain accurate target information due to the target's unpredictable maneuvers, velocity changes, and so on. This paper proposes a novel guidance law based on the PN guidance law using only LOS rate information. The proposed guidance is referred to as uncertainty and disturbance-compensated intercept guidance. Potential of the proposed guidance law is demonstrated with some representative simulations. Robust performance of the proposed guidance system for a time-lag system is also shown with simulation results.