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arXiv 1209.5014math.AP
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周期区域上Benjamin-Ono方程的控制与镇定

Control and Stabilization of the Benjamin-Ono Equation on a Periodic Domain

Felipe Linares, Lionel Rosier

摘要:

Linares和Ortega证明了周期区域T上的线性化Benjamin-Ono方程是精确能控和指数镇定的,分布控制支持在任意子域上.本文的目的是将这些结果推广到完整的Benjamin-Ono方程。反馈法的局部阻尼的形式被纳入方程。利用正则性传播建立的光滑效应,证明了用粘性消失法得到的弱解在L^2(T)中的半全局稳定性.当s>1/2时,利用压缩映射定理证明了H^s(T)的局部适定性和局部指数稳定性.最后,当s>1/2时,将上述反馈律与某些开环控制相结合,得到了H^s(T)中的局部精确能控性.

英文摘要:

It was proved by Linares and Ortega that the linearized Benjamin-Ono equation posed on a periodic domain T with a distributed control supported on an arbitrary subdomain is exactly controllable and exponentially stabilizable. The aim of this paper is to extend those results to the full Benjamin-Ono equation. A feedback law in the form of a localized damping is incorporated in the equation. A smoothing effect established with the aid of a propagation of regularity property is used to prove the semi-global stabilization in L^2(T) of weak solutions obtained by the method of vanishing viscosity. The local well-posedness and the local exponential stability in H^s(T) are also established for s>1/2 by using the contraction mapping theorem. Finally, the local exact controllability is derived in H^s(T) for s>1/2 by combining the above feedback law with some open loop control.

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