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arXiv 1706.02161math.OC
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具有边界控制匹配扰动的一维不稳定wave equations的输出反馈指数镇定

Output feedback exponential stabilization for 1-D unstable wave equations with boundary control matched disturbance

Hua-Cheng Zhou, George Weiss

摘要:

研究了一维不稳定波动方程的输出反馈指数镇定问题,其中边界输入由区域一端的Neumann迹给出,是控制输入与总扰动之和.后者由非线性不确定反馈项和外部有界干扰组成。利用这两个边界位移作为输出信号,我们设计了一个不需要高增益的扰动估计器。结果表明,在估计误差信号为$L^2[0,\infty)$的意义下,扰动估计器可以估计总扰动。利用估计的总扰动,设计了一个状态指数收敛于原系统状态的观测器。最后,我们设计了一个基于前馈的输出反馈镇定控制器。总干扰在反馈回路中通过其估计近似地抵消。闭环系统是指数稳定的,同时保证所有的内部信号一致有界。

英文摘要:

We study the output feedback exponential stabilization of a one-dimensional unstable wave equation, where the boundary input, given by the Neumann trace at one end of the domain, is the sum of the control input and the total disturbance. The latter is composed of a nonlinear uncertain feedback term and an external bounded disturbance. Using the two boundary displacements as output signals, we design a disturbance estimator that does not use high gain. It is shown that the disturbance estimator can estimate the total disturbance in the sense that the estimation error signal is in $L^2[0,\infty)$. Using the estimated total disturbance, we design an observer whose state is exponentially convergent to the state of original system. Finally, we design an observer-based output feedback stabilizing controller. The total disturbance is approximately canceled in the feedback loop by its estimate. The closed-loop system is shown to be exponentially stable while guaranteeing that all the internal signals are uniformly bounded.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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