Nonlinear observer for nonlinear adaptive guidance law considering target uncertainties and control loop dynamics

This paper proposes a nonlinear observer design method for nonlinear adaptive guidance. Several states of the previously proposed nonlinear adaptive guidance law are estimated by a nonlinear observer, which is designed based on the integrated guidance and control model. Using the estimated states and uncertainties, desired engagement performance of the nonlinear adaptive guidance law can be obtained against target maneuver and the limited performance of control loop. The performance and stability analyses of the proposed observer and simulations are included to demonstrate the practical application of our scheme.