Passive control of multiple structural resonances with piezoelectric vibration absorbers

A novel sequential tuning procedure for passive piezoelectric shunts targeting multiple structural modes is proposed in this work. The control authority on each targeted mode can be quantitatively chosen ab initio and shown to limited by passivity requirements, which highlights the fundamental limitations of multimodal shunts. Based effective characteristics system around resonance, electrical damping ratios resonance frequencies are derived using well-established single-mode formulae from literature, thereby fully specifying shunt impedance. approach numerically verified experimentally validated beams emulating with a digital vibration absorber.