Aiming at the problem of impact angle constraint and input saturation, an integrated guidance and control (IGC) algorithm with impact angle constraint and input saturation is proposed. A three-channel independent design model of missile IGC with impact angle constraint is established, and an extended state observer with fast finite-time convergence is designed to estimate and compensate model errors and coupling relationship between channels. Based on the nonsingular terminal sliding mode control and backstepping control, the IGC three-channel independent design is completed. Nussbaum function and an auxiliary system are introduced to deal with the input saturation. The Lyapunov function is constructed to prove the finite-time convergence of the IGC algorithm. The missile six-degree-of-freedom simulation results show the effectiveness and superiority of the IGC algorithm.

中文翻译：

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具有输入饱和度和冲击角约束的集成制导和控制

针对冲击角约束和输入饱和的问题，提出了一种具有冲击角约束和输入饱和的集成制导控制算法。建立了具有冲击角约束的导弹IGC的三通道独立设计模型，并设计了具有快速有限时间收敛性的扩展状态观测器，以估计和补偿模型误差以及通道之间的耦合关系。基于非奇异终端滑模控制和反推控制，完成了IGC三通道独立设计。介绍了Nussbaum函数和辅助系统来处理输入饱和。构造Lyapunov函数以证明IGC算法的有限时间收敛性。