Abstract
A robust horizontal LOS (line-of-sight) rate estimator for a sea skimming ASM (anti-ship missile) is proposed. Based on the homing geometry, a precise LOS rate dynamics model for a two-axis gimballed seeker is derived. A new LOS rate estimator is designed by applying a robust Kalman filter to the LOS rate dynamics model. The proposed filter takes account of roll coupling effects and seeker detection gain uncertainties. Simulation results show that the proposed filter performs very well and guarantees robustness against parameter uncertainties.
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