The three dimensional guidance system design of terminal attack phase for exo-atmospheric kill vehicle

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• 作者：Jian-guo Guo ; Tian-bao Zhang ; ^{whenyel@foxmail.com} ; Jun Zhou ; Bin Zhao ; Guo-qing Wang
• 关键词：Exo-atmospheric kill vehicle (EKV) ; Disturbance observer (DO) ; Sliding mode guidance law ; Modulator ; Describing function technique
• 刊名：Optik - International Journal for Light and Electron Optics
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：130
• 期：Complete
• 页码：1158-1167
• 全文大小：1134 K
• 卷排序：130

文摘

A novel terminal guidance system with a pulse-width-pulse-frequency (PWPF) modulator based on variable dead zone is designed for exo-atmospheric kill vehicle (EKV). At first, a three dimensional (3D) missile-target engagement kinematics is established on the line-of-sight (LOS) coordinate system, the guidance law is compensated by estimated maneuvering acceleration of target from nonlinear disturbance observer (DO). Secondly, a 3D terminal sliding mode guidance law with gradually increasing robustness is proposed for EKV, and the finite time stability of closed system is strictly proven. A PWPF modulator with variable dead zone is proposed to resist the sensitivity of LOS angle with relative distance decreasing, and the stability of modulator is proven by describing function technique. Finally, the guidance performances are assessed through a numerical simulation, the proposed guidance law is better attack precision than traditional guidance law, and the PWPF modulator with variable dead zone is more reasonable in fuel allocation and smaller on miss distance than traditional PWPF modulator.