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arXiv 1810.00512math.OC
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关于耦合Wave Equations的可观测性不等式:无边界情形

On the Observability Inequality of Coupled Wave Equations: the Case without Boundary

Yan Cui, Camille Laurent, Zhiqiang Wang

摘要:

本文研究紧致流形上由一阶或零级项耦合的波动方程的能观性和能控性。本文采用Dehman-Lebeau的论文\cite{DehmanLebeau09}中的方法证明了:紧致无边界流形上一阶项耦合的波动方程的弱能观性不等式成立当且仅当与一阶项符号有关的一类沿Hamilton流的常微分方程是精确能控的.我们还计算了高阶部分的可观测性常数和观测时间。利用对偶性,我们得到了对偶控制系统在有限余维空间中的能控性。在特征函数唯一连续的假设下,这给出了完全能控性。此外,对未知量和空间作适当的变换后,这些结果也可应用于由级联结构的零级项耦合的波动方程组。最后,我们提供了一些具体的例子作为应用程序的唯一连续属性确实持有。

英文摘要:

In this paper, we study the observability and controllability of wave equations coupled by first or zero order terms on a compact manifold. We adopt the approach in Dehman-Lebeau's paper \cite{DehmanLebeau09} to prove that: the weak observability inequality holds for wave equations coupled by first order terms on compact manifold without boundary if and only if a class of ordinary differential equations related to the symbol of the first order terms along the Hamiltonian flow are exactly controllable. We also compute the higher order part of the observability constant and the observation time. By duality, we obtain the controllability of the dual control system in a finite co-dimensional space. This gives the full controllability under the assumption of unique continuation of eigenfunctions. Moreover, these results can be applied to the systems of wave equations coupled by zero order terms of cascade structure after an appropriate change of unknowns and spaces. Finally, we provide some concrete examples as applications where the unique continuation property indeed holds.

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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