In this paper, we propose a guidance law that considers the field-of-view (FOV) limitation as well as the impact angle and time constraints. In order to develop the guidance law, we first design a desired look angle that satisfies the FOV limitation and impact angle constraint. Since the desired look angle is designed as a function of a gain that determines the length of the remaining trajectory, the impact time can also be controlled by adjusting the gain. The guidance law is derived so as to stabilize the actual look angle to the desired look angle based on the sliding mode control method. As a result, the proposed guidance law can intercept the stationary target at the desired impact angle and time with satisfying the FOV constraint. The proposed law is expected to achieve more accurate performance in real applications owing to its closed-loop structure with analytic formulation than the existing approach based on open-loop structure using numerical routine. The effectiveness of the proposed guidance law is demonstrated by numerical simulations.

中文翻译：

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具有视场约束的冲击角度和时间控制的视角整形导引律

在本文中，我们提出了一种考虑视野 (FOV) 限制以及撞击角度和时间限制的制导律。为了制定制导律，我们首先设计一个满足 FOV 限制和撞击角约束的所需视角。由于所需的视角被设计为决定剩余轨迹长度的增益的函数，因此也可以通过调整增益来控制撞击时间。基于滑模控制方法推导出导引律以将实际视角稳定到期望视角。因此，所提出的制导律可以在满足 FOV 约束的情况下以所需的撞击角度和时间拦截静止目标。与基于使用数值程序的开环结构的现有方法相比，由于其具有解析公式的闭环结构，所提出的定律有望在实际应用中实现更准确的性能。数值模拟证明了所提出的制导律的有效性。