Two-stage guidance law with impact time and angle constraints

Two-stage guidance law with impact time and angle constraints
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具有冲击时间和角度约束的两阶段制导律

DOI:
10.1007/s11071-018-4710-3
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发表时间:
2018-12
期刊:
影响因子:
5.6
通讯作者:
Wang Jinzhi
Wang Jinzhi
中科院分区:
工程技术2区
文献类型:
--
作者:
Chen Xiaotian;Wang Jinzhi

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提出了一种用于撞击时间和角度控制的新型两级导弹制导律。该制导律是基于非线性啮合动力学推导出来的,没有使用小角度假设。为了控制冲击时间和冲击角度,开发了两阶段方案。该方案由第一阶段的非奇异滑模制导律和第二阶段的切换目标策略组成。当切换条件满足时,制导律从第一阶段切换到第二阶段,可以保证制导律在正确的时间切换以满足冲击时间约束。第二阶段的切换目标策略可以实现高精度的撞击角度控制。在这种两阶段方案下,可以同时控制冲击时间和角度。进行数值模拟以证明所提出方法的性能。
A novel two-stage missile guidance law for impact time and angle control is proposed. This guidance law is derived based on the nonlinear engagement dynamics without using small angle assumption. In order to control both impact time and impact angle, a two-stage scheme is developed. This scheme is composed of a nonsingular sliding mode guidance law for the first stage and a switching target strategy for the second stage. The guidance law is switched from the first stage to the second stage when the switching condition is attained, which can ensure that the guidance law is switched at the right time to satisfy impact time constraint. The switching target strategy in the second stage can achieve impact angle control with high accuracy. Impact time and angle can be controlled simultaneously under this two-stage scheme. Numerical simulations are performed to demonstrate the performance of the proposed method.
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