Exponential Stability of a Degenerate Euler-Bernoulli Beam with Axial Force and Delayed Boundary Control

TL;DR

This paper proves the exponential stabilization of a degenerate Euler-Bernoulli beam with axial force and delayed boundary control, extending stability theory for complex distributed systems.

Contribution

It introduces a novel Lyapunov functional and establishes exponential stability for a degenerate beam with delay and axial force, addressing well-posedness and decay rate.

Findings

System energy decays exponentially to zero.

Constructed a new Lyapunov functional with weighted integral terms.

Proved the associated operator generates a contraction semigroup.

Abstract

This work investigates the global exponential stabilization of a degenerate Euler-Bernoulli beam subjected to a non uniform axial force and a delayed feedback control. First, we address the well-posedness of the system by constructing an appropriate energy space in weighted Sobolev settings. Using L\"umer-Phillips theorem, we prove that the linear operator associated with the problem generates a $\mathcal{C}_0$-semigroup of contractions. Next, we establish the uniform exponential stability of the system. By constructing a novel Lyapunov functional incorporating weighted integral terms, we demonstrate that the energy of the system exponentially decays to zero and derive a precise decay rate estimate. This work provides a significant extension to the stability theory for complex distributed parameter systems.