Onset and stabilization of delay-induced instabilities in piezoelectric digital vibration absorbers

The stability of a piezoelectric structure controlled by digital vibration absorber emulating shunt circuit is investigated in this work. formalism feedback control theory used to demonstrate that systems with low electromechanical coupling are prone delay-induced instabilities entailed the sampling procedure unit. An explicit relation derived between effective factor and maximum period guaranteeing stable system. Since may be impractically small, simple modification emulated admittance proposed order counteract effect delays anticipation. theoretical developments experimentally validated on clamped-free beam.