Exponential Stability of Slowly Time-Varying Nonlinear Systems

被引:0
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作者
Joan Peuteman
Joan Peuteman
Dirk Aeyels
机构
[1] SYSTeMS,
[2] Universiteit Gent,undefined
[3] Technologiepark-Zwijnaarde 9,undefined
[4] 9052 Gent (Zwijnaarde),undefined
[5] Belgium. Dirk.Aeyels@rug.ac.be.,undefined
[6] Joan Peuteman is presently working at the KHBO,undefined
[7] Departement Industriële Wetenschappen en Technologie,undefined
[8] Zeedijk 101,undefined
[9] 8400 Oostende,undefined
[10] Belgium. Joan.Peuteman@kh.khbo.be.,undefined
关键词
Key words. Differential equations, Exponential stability, Liapunov stability, Slowly time-varying systems, Lur'e systems, Pendulum.;
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摘要
Let \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}\end{document} be a time-varying vector field depending on t containing a regular and a slow time scale (α large). Assume there exist a k (τ)≥1 and a γ(τ) such that ∥xτ(t, t0, x0)∥≤k(τ) e−γ(τ)(t−t0)∥x0∥, with xτ(t, t0, x0) the solution of the parametrized system \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}\end{document} with initial state x0 at t0. We show that for α sufficiently large \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}\end{document} is exponentially stable when “on average”γ(τ) is positive. The use of this result is illustrated by means of two examples. First, we extend the circle criterion. Second, exponential stability for a pendulum with a nonlinear slowly time-varying friction attaining positive and negative values is discussed.
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页码:202 / 228
页数:26
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