ABSOLUTE OBSERVATION STABILITY FOR
EVOLUTIONARY VARITIONAL INEQUALITIES
Gennady Leonov, Volker Reitmann
We derive absolute observation stability and instability
results for controlled evolutionary inequalities
which are based on frequency-domain characteristics
of the linear part of the inequalities. The uncertainty
parts of the inequalities (nonlinearities which represent
external forces and constitutive laws) are described by
certain local and integral quadratic constraints. Other
terms in the considered evolutionary inequalities represent
contact-type properties of a mechanical system
with dry friction.