Extended State Observer-based Integrated Guidance and Control with Impact Angle Constraint and Input Saturation

Taking input saturation and impact angle constraint into consideration, an anti-windup integrated guidance and control (IGC) scheme is proposed based on dynamic surface control technique in this paper. The auxiliary system is constructed to analyse and compensate the adverse effect of input saturation. Moreover, the finite-time extend state observer is employed to estimate and compensate the uncertainties in the IGC system. According to the stability analysis, the proposed IGC scheme can ensure that all signals in the closed-loop system are uniformly ultimately bounded in presence of input saturation. Nonlinear simulation results are proposed to illustrate the effectiveness of the proposed IGC scheme.