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具有对称初始数据的二维反应扩散方程的边界镇定

DOI: 10.16383/j.aas.2015.c140108, PP. 209-214

Keywords: 边界控制,镇定,反步法,扩散反应方程,李雅普诺夫函数

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Abstract:

?研究了二维圆盘上具有对称初始数据的反应扩散方程的边界控制.由于初始条件和边界条件关于圆心旋转对称,系统可以转化为等价的极坐标系下的一维抛物方程.此时,极点的奇异性成为了控制器设计中的难点.本文设计了一系列方程变换,消除了核函数方程中极点奇异性的影响,将其转化为修正的Bessel方程,求出了显式的核函数表达式和精确的边界反馈控制律,扩展了偏微分方程的backstepping方法.系统的收敛速度可通过改变控制器中的一个参数来调节.然后用Lyapunov函数法证明了闭环系统在H1范数下指数稳定,表明了系统对初值的连续依赖.最后用数值仿真验证了方法的有效性.

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