Dynamic stabilization of an Euler-Bernoulli beam under boundary control and non-collocated observation

We study the dynamic stabilization of an Euler-Bernoulli beam System using boundary force control at the free end and bending strain observation at the clamped end. We construct an infinite-dimensional observer to track the state exponentially. A proportional output feedback control based on the estimated state is designed. The closed-loop system is shown to be non-dissipative but admits a set of generalized eigenfunctions, which forms a Riesz basis for the state space. As consequences, both the spectrum-determined growth condition and exponential stability are concluded. (C) 2008 Elsevier B.V. All rights reserved.