13 research outputs found
Energy decay for solutions of the wave equation with general memory boundary conditions
We consider the wave equation in a smooth domain subject to Dirichlet
boundary conditions on one part of the boundary and dissipative boundary
conditions of memory-delay type on the remainder part of the boundary, where a
general borelian measure is involved. Under quite weak assumptions on this
measure, using the multiplier method and a standard integral inequality we show
the exponential stability of the system.
Some examples of measures satisfying our hypotheses are given, recovering and
extending some of the results from the literature.Comment: 14 pages, submitted to Diff. Int. Eq
A remark on the stabilization of the 1-d wave equation
International audienceWe consider the wave equation on an interval of length 1 with an interior damping at and with Dirichlet boundary condition at the two ends. It is well-known that, if is rational, the energy does not decay to 0. In this case, we prove that the energy decays exponentially to a constant which we identify
Feedback Stabilization of a Class of Diagonal Infinite-Dimensional Systems with Delay Boundary Control
This paper studies the boundary feedback stabilization of a class of diagonal
infinite-dimensional boundary control systems. In the studied setting, the
boundary control input is subject to a constant delay while the open loop
system might exhibit a finite number of unstable modes. The proposed control
design strategy consists in two main steps. First, a finite-dimensional
subsystem is obtained by truncation of the original Infinite-Dimensional System
(IDS) via modal decomposition. It includes the unstable components of the
infinite-dimensional system and allows the design of a finite-dimensional delay
controller by means of the Artstein transformation and the pole-shifting
theorem. Second, it is shown via the selection of an adequate Lyapunov function
that 1) the finite-dimensional delay controller successfully stabilizes the
original infinite-dimensional system; 2) the closed-loop system is
exponentially Input-to-State Stable (ISS) with respect to distributed
disturbances. Finally, the obtained ISS property is used to derive a small gain
condition ensuring the stability of an IDS-ODE interconnection.Comment: Preprin