反推
控制理论(社会学)
固定翼
观察员(物理)
计算机科学
高超音速
趋同(经济学)
有界函数
Lyapunov稳定性
非线性系统
李雅普诺夫函数
数学
控制(管理)
工程类
自适应控制
人工智能
物理
数学分析
航空航天工程
经济
翼
经济增长
量子力学
作者
Xiao Wang,Jie Guo,Shengjing Tang,Shuai Qi
标识
DOI:10.1016/j.isatra.2018.12.013
摘要
This paper proposes a fixed-time backstepping control scheme based on fixed-time disturbance observer for flexible air-breathing hypersonic vehicles. The backstepping control is combined with the fixed-time control technique to achieve fixed-time convergence. A fixed-time super-twisting disturbance observer, which is convergent independently of initial conditions, is employed to estimate and compensate the uncertainties and flexible effects in tracking process. A nonlinear first-order filter is adopted to avoid the "explosion of complexity" problem that arises in traditional backstepping, and to guarantee overall fixed-time stability. The closed-loop system is proven to be semi-globally uniformly ultimately fixed-time bounded via Lyapunov analysis. Simulation results are given to demonstrate the effectiveness of the proposed scheme.
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