UCAV对地攻击目标占位变结构导引律研究

Occupation Guidance of Air-to-Ground Attack for UCAV Based on Variable-Structure Control

针对无人作战飞机(UCAV)末端打击时攻击占位问题,基于质点模型,利用投影原理将三维运动投影到惯性坐标系的两个平面内,考虑到两个平面之间的速度和角度关系,得到了不同于一般形式的导引系统方程,然后运用滑模变结构控制理论设计并推导了纵向和侧向导引指令。最后对导引过程进行数字仿真,仿真结果表明,所提方法可有效地将无人作战飞机导引到一个很小的区域内并保持姿态稳定,提高作战效能。

In order to obtain good position for Unmanned Combat Aerial Vehicles （UCAV） in the terminal phase, based on particle model, the relationship with velocity and angle in the two planes is considered. Uncommon state equations of navigation system are established by projecting three - dimensional motion into two planes of the in- ertial coordinate system. Then, based on the sliding - mode variable - structure control theory, the longitudinal and lateral guidance taws are designed and inferred respectively. Finally, the navigation process is simulated, the results demonstrate that the guidance law can guide UCAV to a small zone with attitude stable validity, the operational effec- tiveness is improved.