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- Michael Bb, Fb Mathematik, M A Demetriou, Simeon Reich, I G Rosen
- 1995

A model reference adaptive control law is deened for nonlinear distributed parameter systems. The reference model is assumed to be governed by a strongly coercive linear operator deened with respect to a Gelfand triple of reeexive Banach and Hilbert spaces. The resulting nonlinear closed loop system is shown to be well posed. The tracking error is shown to… (More)

The problem of estimating a spatially distributed process described by a partial differential equation (PDE), whose observations are contaminated by a zero mean Gaussian noise, is considered in this work. The basic premise of this work is that a set of mobile sensors achieve better estimation performance than a set of immobile sensors. To enhance the… (More)

- J Baumeister, W Scondo, M A Demetriou, I G Rosen
- 1997

The on-line or adaptive identification of parameters in abstract linear and nonlin-ear infinite-dimensional dynamical systems is considered. An estimator in the form of an infinite-dimensional linear evolution system having the state and parameter estimates as its states is defined. Convergence of the state estimator is established via a Lyapunov estimate.… (More)

- H T Banks, M A Demetriou, R C Smith
- 1994

A feedback control computational methodology for reducing acoustic sound pressure levels in a 2-D cavity with a exible boundary (a beam) is investigated. The control is implemented in this model through voltages to piezoceramic patches on the beam which are excited in a manner (out-of-phase) so as to produce pure bending moments. The incorporation of the… (More)