Small-gain theorem for a class of abstract parabolic systems. (English) Zbl 1403.49030
This paper deals with a class of abstract control system of parabolic type with observation which the state, input and output spaces are Hilbert spaces. The state space operator is assumed to generate a linear exponentially stable analytic semigroup. An observation and control action are allowed to be described by unbounded operators. It is assumed that the observation operator is admissible but the control operator may be not. Such a system is controlled in a feedback loop by a controller with static characteristic being a globally Lipschitz map from the space of outputs into the space of controls. The author obtains a perturbation theorem of the small-gain-type which guarantees that null equilibrium of the closed-loop system will be globally asymptotically stable in Lyapunov’s sense.
Reviewer: Elvira Mascolo (Firenze)
Keywords:
control of infinite-dimensional systems; semigroups; infinite-time LQ-control problem; Lur’e feedback systemsReferences:
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