Stabilization analysis of a generalized nonlinear axially moving string by boundary velocity feedback

Stabilization analysis of a generalized nonlinear axially moving string by boundary velocity feedback
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基于边界速度反馈的广义非线性轴向运动弦的稳定性分析

DOI:
10.1016/j.automatica.2007.06.004
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发表时间:
2008-02
期刊:
影响因子:
6.4
通讯作者:
Li, Tie-Cheng
Li, Tie-Cheng
中科院分区:
计算机科学2区
文献类型:
--
作者:
Li, Jun-Feng;Hou, Zhi-Chao;Li, Tie-Cheng

文献摘要

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本文研究了轴向运动的非线性弦线在上游或下游受边界控制时的振动抑制问题。根据汉密尔顿原理推导了运动方程和边界条件,用应变的精确表达式来描述有限横向变形引起的几何非线性。我们可以通过文献中发现的各种更简单的模型来近似这个模型。我们表明,通过线性负速度反馈作用在一端的字符串的运动字符串的振荡可以指数稳定。我们的证明依赖于李雅普诺夫的直接方法,使用精心构造的能量泛函。
This paper addresses vibration suppression of an axially moving nonlinear string subject to boundary control at either the downstream or the upstream end. The equation of motion and the boundary conditions are derived from Hamilton's Principle, using the exact expression of the strain to describe the geometrical nonlinearity due to the finite transverse deformation. We can approximate this model by various simpler models found in the literature. We show that the oscillations of the moving string can be stabilized exponentially via linear negative velocity feedback acting at one end of the string. Our proofs rely on Lyapunov's direct method, using a carefully constructed energy functional.
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