Barrier Lyapunov Function Based Integrated Missile Guidance and Control Considering Phased Array Seeker Disturbance Rejection Rate

A two-dimensional missile-target engagement geometry is established considering the effect of the disturbance rejection rate (DRR) problem caused by phased array radar beam pointing error and radome refraction error in the guidance and control system. Compared with the traditional two-dimensional missile-target engagement geometry, the established model clearly shows the effect of the disturbance rejection rate problem on the missile line of sight and field-of-view constraint. The integrated missile guidance and control scheme is developed by adding the integral barrier Lyapunov function to dynamic surface control to satisfy the seeker field-of-view constraint while ensuring that the system has strong robustness. The target maneuvering and unmodeled disturbance with the effect of the DRR error slope as uncertain disturbances of the system and use the reduced-order extended state observer for online estimation. Moreover, the actuator deflection angle and angular rate constraints are guaranteed via the command filter. Stability analysis and numerical simulations show that the estimation and compensation of the seeker DRR error allow the proposed scheme to intercept a high-speed target accurately.