arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2008.01932math.OC
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抛物型偏微分方程在空间超范数下的相对稳定性和输入-状态稳定性

Relative Stability in the Sup-norm and Input-to-state Stability in the Spatial Sup-norm for Parabolic PDEs

Jun Zheng, Guchuan Zhu, Sergey Dashkovskiy

摘要:

本文引入相对$\mathcal{K}$ -等稳定性(RKES)的概念来刻画非线性抛物型偏微分方程组(弱)解对外部扰动的一致连续依赖性.基于RKES,我们证明了一类具有Dirichlet或Robin边界扰动的非线性抛物型偏微分方程在空间超范数下的输入-状态稳定性.分别以Robin边界条件下的超线性抛物型偏微分方程和带失稳项的$1$ -D抛物型偏微分方程为例,对所得结果进行了验证.此外,作为RKES概念的应用,我们对一类在区域上或区域边界上级联耦合的抛物型偏微分方程,分别在空间和时间超范数下,以及在空间超范数下进行了稳定性分析。De Giorgi迭代技术被广泛用于证明本文的结果。

英文摘要:

In this paper, we introduce the notion of relative $\mathcal{K}$-equi-stability (RKES) to characterize the uniformly continuous dependence of (weak) solutions on external disturbances for nonlinear parabolic PDE systems. Based on the RKES, we prove the input-to-state stability (ISS) in the spatial sup-norm for a class of nonlinear parabolic PDEs with either Dirichlet or Robin boundary disturbances. Two examples, concerned respectively with a super-linear parabolic PDE with Robin boundary condition and a $1$-D parabolic PDE with a destabilizing term, are provided to illustrate the obtained ISS results. Besides, as an application of the notion of RKES, we conduct stability analysis for a class of parabolic PDEs in cascade coupled over the domain or on the boundary of the domain, in the spatial and time sup-norm, and in the spatial sup-norm, respectively. The technique of De Giorgi iteration is extensively used in the proof of the results presented in this paper.

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