Dielectric Elastomer based linear actuators are usually composed of one or more elastomer films and a flexible supporting frame. This paper proposes a methodology that allows to modify the available thrust as a function of the actuator’s length at will of the designer and, in particular, to obtain constant force actuators. The design procedure is divided in two steps: 1) optimization of the Dielectric Elastomer electromechanical parameters 2) design of the flexible frame. The supporting frame is conceived as a compliant mechanism and makes use of the stiffness characteristics of slider-crank mechanisms with elastic revolute pairs to be coupled (in symmetric or axis-symmetric configurations) with films of different geometries. Three actuator concepts are proposed which highlight the goodness of the proposed method.
Metodologia per la sintesi progettuale di attuatori ad elastomeri dielettrici / Berselli, Giovanni; Vertechy, Rocco; G., Vassura; V., Parenti Castelli. - ELETTRONICO. - (2009), pp. 1-14. (Intervento presentato al convegno AIAS’09, Convegno Nazionale dell’ Associazione Italiana per l’ Analisi delle Sollecitazioni tenutosi a Torino nel 9-11 Settembre 2009).
Metodologia per la sintesi progettuale di attuatori ad elastomeri dielettrici.
BERSELLI, Giovanni;VERTECHY, Rocco;
2009
Abstract
Dielectric Elastomer based linear actuators are usually composed of one or more elastomer films and a flexible supporting frame. This paper proposes a methodology that allows to modify the available thrust as a function of the actuator’s length at will of the designer and, in particular, to obtain constant force actuators. The design procedure is divided in two steps: 1) optimization of the Dielectric Elastomer electromechanical parameters 2) design of the flexible frame. The supporting frame is conceived as a compliant mechanism and makes use of the stiffness characteristics of slider-crank mechanisms with elastic revolute pairs to be coupled (in symmetric or axis-symmetric configurations) with films of different geometries. Three actuator concepts are proposed which highlight the goodness of the proposed method.
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