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弹道学报  2013 

再入飞行器多约束预测-修正末导引律研究

Keywords: 再入飞行器,滑模变结构控制,预测,导引律,多约束

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Abstract:

为了保证再入飞行器以期望倾角和速度准确投放载荷,利用终端倾角约束下的滑模变结构控制进行实时弹道预测,通过速度修正指令实现飞行器的机动减速,以达到期望的投弹倾角和速度。分别计算了目标点位于13km和3km高度时的飞行轨迹及飞行参数。对仿真结果的对比分析表明:采用倾角约束导引律时,飞行器终端倾角满足期望的-30°,但是其终端速度分别为1550m/s和1450m/s,远高于期望的1200m/s;采用倾角-速度多约束导引律时,终端倾角和速度均达到了期望水平,而且攻角、倾斜角以及各向过载均满足限制条件;多约束预测-修正导引律更有利于再入飞行器准确投放载荷。

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