Continuous-Time Predictive Control-Based Integrated Guidance and Control

Abstract

In this paper, a continuous-time predictive control-based novel integrated guidance and control formulation is proposed. Treating the target acceleration as a mismatched external disturbance, it is estimated along with the system states by means of a generalized extended state observer, and the estimates are used in the predictive design to make the latter implementable. Although the generalized extended state observer has robustified as well as addressed the need of a complete state vector in the predictive controller, the predictive control framework has offered a systematic approach for the design of the feedback control gain and disturbance compensation gain needed in the generalized extended state observer-based controller. Closed-loop stability of the overall system including the stability of internal dynamics is established. Simulation results including Monte Carlo simulation are presented to demonstrate the efficacy of the proposed integrated guidance and control law. The highlights of the formulation are that it is implementable using conventional seeker measurements; does not need any information about target maneuvers; caters to constraints on control inputs; and offers satisfactory performance for constant as well as varying missile velocities, stable as well as unstable configurations, and for different target acceleration profiles representative of highly maneuvering targets.