The terminal constraints in entry guidance design are generally position and velocity constraints. In this study, the terminal time constraint is also taken into account. The estimates of time-to-go and range-to-go are discussed based on the quasi-equilibrium glide condition. Further analysis reveals that only two among the time-to-go, range-to-go, and terminal velocity are independent. Based on this observation, a guidance method is designed, which provides a new aspect to exploit the potential of entry guidance.

中文翻译：

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基于准平衡下滑条件的终端时间控制进入引导

入口引导设计中的终端约束一般是位置和速度约束。在本研究中，还考虑了终端时间约束。基于准平衡滑翔条件讨论了飞行时间和飞行距离的估计。进一步的分析表明，飞行时间、飞行距离和终端速度中只有两个是独立的。基于这一观察，设计了一种引导方法，该方法为开发入门引导的潜力提供了一个新的方面。