用单一控制量同时精准控制拦截弹的撞击时间和角度。
Terminal Time and Angle-Constrained Nonlinear Intercept Guidance
- 分层滑模结构，分别处理时间与角度误差。
- 可适应静止或匀速目标，实现精确命中。
- 适合需要精确打击的导弹制导场景。
本文研究了仅以侧向加速度为控制输入时，同时控制拦截弹撞击时间与撞击角度的问题。由于非线性交战运动学存在欠驱动特性，指导律设计面临挑战。为此，提出一种基于分层滑模的制导律，包含两层滑模面：第一层由对应撞击时间与角度误差动力学的两个子滑模面构成；第二层引入复合滑模面，融合两个子滑模面。进一步设计变增益自适应制导律，确保对静止目标实现时间与角度约束拦截，并拓展至匀速目标。通过多种交战场景仿真验证了所提方法的有效性。
原文摘要 · Abstract (English)
This paper considers the problem of simultaneously controlling an interceptor's impact time and impact angle using its lateral acceleration as the sole control input. With a single control input, the nonlinear engagement kinematics is inherently underactuated, which complicates guidance law synthesis. To overcome this challenge, a hierarchical sliding mode-based guidance law is developed to concurrently regulate the two terminal constraints. The proposed architecture consists of a two-layer sliding manifold. The first layer comprises two sub-sliding surfaces corresponding to the impact time and impact angle error dynamics, respectively, while the second layer introduces a composite sliding manifold that combines the two individual sub-surfaces. Then, a variable-gain adaptive guidance law is designed to ensure time and angle-constrained interception against a stationary target, which is further extended to intercept a constant velocity target. Simulations are conducted for various engagement scenarios to attest to the efficacy of the proposed approach.
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