This article proposes an impact-time-control guidance law that can keep a non-maneuvering moving target in the seeker’s field of view (FOV). For a moving target, the missile calculates a predicted intercept point (PIP), designates the PIP as a new virtual stationary target, and flies to the PIP at the desired impact time. The main contribution of the article is that the guidance law is designed to always lock onto the moving target by adjusting the guidance gain. The guidance law for the purpose is based on the backstepping control technique and designed to regulate the defined impact time error. In this procedure, the desired look angle, which is a virtual control, is designed not to violate the FOV limit, and the actual look angle of the missile is kept within the FOV by tracking the desired look angle. To validate the performance of the guidance law, numerical simulation is conducted with different impact times. The result shows that the proposed guidance law intercepts the moving target at the desired impact time maintaining the target lock-on condition.

本文提出了一种影响时间控制的指导法则，该法则可以将非机动目标保持在搜寻者的视野（FOV）中。对于移动目标，导弹计算预测的拦截点（PIP），将PIP指定为新的虚拟固定目标，并在所需的撞击时间飞行到PIP。本文的主要贡献在于，制导律旨在始终通过调整制导增益来锁定运动目标。为此目的的指导律是基于反推控制技术的，旨在调节定义的冲击时间误差。在该程序中，设计成虚拟控制的期望视角不会违反FOV限制，并且通过跟踪期望视角将导弹的实际视角保持在FOV之内。为了验证制导律的性能，在不同的冲击时间下进行了数值模拟。结果表明，拟议的制导律在保持目标锁定状态的情况下，在期望的撞击时间拦截了移动目标。