Abstract
A global fast convergent integrated guidance and control design approach is proposed. A disturbance observer is utilized to estimate the uncertainties of integrated guidance and control model in finite time. According to the multiple sliding-mode surface control, the independent nonsingular terminal sliding functions are presented in each step, and all the sliding-mode surfaces run parallel. These presented sliding-mode surfaces keep zero value from a certain time, and the system states converge quickly in sliding phase. Therefore, the system response speed is increased. The proposed method offers the global convergent time analytically, which is useful to optimize the transient performance of system. Simulation results are used to verify the proposed method.
摘要
本文提出一种全局快速收敛的制导控制一体化设计方法。利用干扰观测器对一体化模型中的不 确定性进行有限时间精确估计;基于多滑模面控制方法,在每一步提出独立的非奇异终端滑模函数, 且这些滑模面并行运行,从某时刻起滑模面保持零值,系统状态在滑动阶段快速收敛。因此,系统反 应速度提高。所设计的方法提供系统全局收敛时间的解析表达式,有利于优化系统的动态性能。仿真 结果验证了该方法的优越性。
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Foundation item: Project(61673386) supported by the National Natural Science Foundation of China; Project(2018QNJJ006) supported by the High-Tech Institute of Xi’an, China
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Song, Ht., Zhang, T. Fast integrated guidance and control with global convergence. J. Cent. South Univ. 26, 632–639 (2019). https://doi.org/10.1007/s11771-019-4034-6
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DOI: https://doi.org/10.1007/s11771-019-4034-6
Key words
- integrated guidance and control (IGC)
- global convergence
- disturbance observer
- multiple sliding-mode surface control