| 摘要: |
| 为改善导弹受到干扰或加装被动捷联导引头仅能够完成视线角度或纯方位量测情况下的导弹制导信息估计性能,提出了一种适用于纯方位量测的微分对策制导律。首先,通过对范数型微分对策制导律对策空间的分析,明确了捕获区的制导特性可以用于改进纯方位测量情况下的可观测性的设计思路。其次,在完成纯方位估计器设计的基础上,利用估计均方误差反映估计器可观测性的特性,建立了导弹控制量和可观测性之间的关系。然后在微分对策空间的捕获区域内,进行制导控制指令的选取,保证脱靶量的同时,提升估计器的可观测性能。最后给出了所提出的增强可观测性的制导律的执行流程,并考虑控制系统延迟和外部其他不确定性因素的影响,以及脱靶量控制优先的原则,对零控脱靶量参数和剩余飞行时间参数进行了设计。制导律的设计方法超出了确定性等价原理的框架,实现了滤波和制导律的集成设计。非线性仿真对比表明,采用所提出的制导律,可以获得较好的目标信息估计性能,且具有较高的单发命中概率。 |
| 关键词: 制导律 微分对策 纯方位量测 可观测性增强 滤波和制导集成 |
| DOI：10.11918/202111094 |
| 分类号:V448.133 |
| 文献标识码:A |
| 基金项目:航空科学基金(201901012009) |
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| Differential game guidance law for enhanced observability with bearings-only measurements |
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HUA Wenhua1,ZHANG Jinpeng1,2
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(1.China Airborne Missile Academy, Luoyang 471009, Henan, China; 2.Aviation Key Laboratory of Science and Technology on Airborne Guided Weapons(China Airborne Missile Acodemy), Luoyang 471009, Henan, China)
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| Abstract: |
| A differential game guidance law for bearings-only measurements is proposed to improve the estimation performance of the missile guidance information. The situation of line of sight angles only or bearings-only measurements can be generated from disturbed or passive strapdown seeker of missile. First, through the analysis of the game space of the norm differential game guidance law, it is clear that the characters of the capture zone can be used to improve the observability of bearings-only measurements. Secondly, on the basis of completing the design of bearings-only estimator, the relationship between missile commands and observability is established by using the character of estimation mean square error reflecting the observability. Then, in the capture zone of the differential game space, guidance control commands are selected to guarantee the miss distance and improve the observability. Lastly, the execution process of the proposed differential game guidance law for enhancing observability is presented, and the zero-effort miss distance parameter and the time-to-go parameter are designed for the consideration of the control system delay, principle of miss distance control priority and other external uncertainties. This approach of guidance law design breaks through the frame of certainty equivalence principle, and realizes the integrated design of filter and guidance law. The nonlinear simulation comparison shows that the proposed guidance law can improve estimation performance of the target information and has higher single-shot kill probability. |
| Key words: guidance law differential game bearings-only measurements observability enhancement filter and guidance integration |
