Abstract
AbstractThe problem of a missile attacking maneuvering targets has been considered in this paper.Meanwhile, a new integrated guidance and control (IGC) method for interceptors with the impact angle is constrained has been proposed. Aimed at achieving the convergence in finite-time ,as well as satisfactory input characteristics, this paper presents a time-varying sliding mode control (TVSMC) method, in which a time-base generator function (TBG) is introduced. Then, this IGC scheme is developed based on the TVSMC and back-stepping technique. At each step, the derivative of the virtual signal is approximated by a tracking differentiator (TD). To enhance the system robustness, the fractional power extended state observer (FPESO) is introduced,for estimating the lumped disturbances and the target maneuvering. Based on the Lyapunov tools, the closed-loop system states are proved to converge into tiny regions around the origin state at the interception time. Finally, the IGC law proposed in this paper has been proved to be effective.KeywordsManeuvering targetIntegrated guidance and controlImpact angle constraintTime-varying sliding modeExtended state observer
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