Partial integrated missile guidance and control with input constraints

In this paper, we present a new scheme to design adaptive controller for uncertain nonlinear systems with nonsymmetric input constraints. Using the Lyapunov stability theory, it is shown that the asymptotic stability can be achieved with the input subjected to the control capacity. Unlike some existing control schemes for systems with uncertainties, the developed controller does not require the bounds of uncertainties known. Then the obtained results are applied to integrated guidance and control (IGC) design for a missile with actuator saturation. Due to the inherent property of time scale separation between the translational and rotational dynamics, a two-loop controller structure is used, called partial integrated guidance and control. The outer loop, which generates directly the commanded pitch rate is constructed, and then the inner loop is designed to track the outer loop command. Finally, simulations are conducted on the nonlinear longitudinal missile model and hit-to-kill interception is achieved.