新型制导律在控制量受限下精确控制命中时间。
Bounded-Input True Proportional Navigation for Impact-Time Control
- 基于真比例导引，用精确时间估算替代近似方法。
- 显式考虑控制输入上限，确保制导指令可行。
- 适用于多种目标运动场景，适合导弹制导应用。
本文提出一种非线性制导策略，可在严格满足控制输入（指令加速度）上限的前提下，拦截匀速且不机动的目标。与依赖线性化或小角度近似的传统方法不同，该策略以真比例导引（TPNG）为基础，采用精确的时间至相遇公式，适用范围更广。区别于多数现有方法未将控制限值纳入设计，本方案将拦截器加速度建模为动态变量，显式考虑输入约束。基于滑模控制技术，推导出能实现时间约束拦截的制导律。在多种交战场景下评估了该策略性能。
原文摘要 · Abstract (English)
This paper proposes a nonlinear guidance strategy capable of intercepting a constant-velocity, non-maneuvering target while strictly satisfying the prescribed bounds on the control input (commanded acceleration). Unlike conventional strategies that estimate time-to-go using linearization or small-angle approximations, the proposed strategy employs true proportional-navigation guidance (TPNG) as a baseline, which utilizes an exact time-to-go formulation and is applicable over a wide range of target motions. In contrast to most existing strategies, which do not incorporate control input bounds into the guidance design, the proposed approach explicitly accounts for these limits by modeling the interceptor acceleration as a dynamic variable. Based on the sliding mode control technique, an effective guidance law that achieves time-constrained interception while accounting for bounded input is then derived. The performance of the proposed strategy is evaluated for various engagement scenarios.
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