Multi-modal damping by shunted piezo-patches: Possible aeroelastic applications

Article type: Research Article

Authors: Agneni, Alessandro^a | Del Sorbo, Matteo^a | Mastroddi, Franco^{a; *} | Polli, Gian Mario^a

Affiliations: [a] Dipartimento di Ingegnaria Aerospaziale e Astronautica, Università degli Studi di Roma "La Sapienza", Via Eudossiana, 16, 00184, Rome, Italy

Correspondence: [*] Corresponding author. Tel.: +39 06 44585945; Fax: +39 06 44585670; E-mail: franco.mastroddi@uniroma1.it

Abstract: Piezoelectric devices shunted on resistive-inductive loads typically operates on a single mode of a structure as their mechanical counterparts: the vibration absorbers. Similarly, multiple piezo patches, operating on different vibrating modes, may be used to perform a multi-modal damping. This result may be achieved either connecting different piezo patches to different electrical circuits, either connecting to a single multiple mode network one single set of piezo-electric elements. Several ladder networks were proposed in the past in order to damp more modes simultaneously. In this paper a Cauer network has been adopted together with notch filters having the duty to filter out one mode at a time. The possibility to use this type of circuit has been investigated studying the elastic and aeroelastic vibrations of a small glider wing by means the aeroelastic analysis performed by a commercial code based on a modal approach.

DOI: 10.3233/JAE-2006-709

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 24, no. 1-2, pp. 1-24, 2006