摘要
针对视线角速率与攻角都无法测量的高速拦截弹制导控制一体化(IGC)系统,提出一种新型基于部分状态反馈的控制器。首先,基于线性扩张状态观测器(LESO)同时观测不可测的中间状态与未知干扰。之后,基于反演控制(BC)设计控制器,反演算法中的虚拟及真实控制量都只使用已知状态与LESO观测的中间状态,避免使用不可测状态。此外,反演中还使用LESO估计的未知干扰进行补偿来提高控制器的鲁棒性。随后,基于lyapunov稳定性理论证明了整个闭环系统的稳定性。最后,将新方法与现有采用全状态反馈的IGC算法进行对比仿真。仿真结果表明,在不使用视线角速率与攻角的情况下,新方法依旧能够保证足够的拦截精度。
For the integrated guidance and control （IGC） system of hypersonic interceptor with unmeasurable LOS angle rate and angle of attack, a novel controller based on partial states feedback is proposed. Firstly, the unmeasurable states and uncertainties are observered by a linear extended state observer （LESO）. Then, a back-stepping controller is proposed for the IGC system. The proposed back-stepping controller not only use the estimated state to avoid using unmeasurable LOS angle rate and angle of attack, but also use the estimated uncertainties to enhance the robustness of IGC system. the closed loop system stability is proved by the Lyapunov theory. Simulation results demonstrate the the proposed method still can achieve enough small miss distance even if the LOS angle rate and angle of attack are unmeasurable.
出处
《西北工业大学学报》
EI
CAS
CSCD
北大核心
2017年第6期954-960,共7页
Journal of Northwestern Polytechnical University
关键词
部分状态反馈
观测器
非匹配干扰
反演法
制导控制一体化
partial states feedback
observer
mismatched uncertainties
Back-stepping control
integrated guidance and control
angle of attack
backstepping
closed loop systems
controllers
Lyapunov function
Mach number
