SDRE Optimal Sliding Mode Guidance Law Design with Attack Angle Constraint

This paper presents an analysis for two-dimensional terminal guidance problem considering target maneuvering and missile autopilot characteristics. A State Dependent Riccati Equation(SDRE) optimal guidance law with attack angle constraint for target nonmeneuvering is designed based on SDRE method. Based on the non singular terminal sliding mode surface, a SDRE optimal adaptive non singular terminal sliding mode guidance law is proposed using SDRE method for target maneuvering. The stability of the closed-loop system with respect to the proposed control scheme is proved via Lyapunov theory, and the results of numerical simulations are presented to demonstrate the effectiveness of the proposed approach.