Constant-Force actuators based on Dielectric Elastomers (DE) can be obtained by coupling a DE film with particular compliant frames whose structural properties must be carefully designed. In any case, the practical achievement of a desired force profile can be quite a challenging task owing to the time-dependent phenomena which affect the DE electromechanical response. Within this scenario, a hyper-viscoelastic model of a rectangular Constant-Force actuator is reported. The model, based on the Bond Graph formalism, can be used as an engineering tool when designing and/or controlling actuators which are expected to work under given nominal conditions. Numerical simulations are provided which predicts the system response to fast changes in activation voltage and actuator position as imposed by an external user.
Bond Graph Modeling And Simulation Of A Constant-Force Dielectric Elastomer Actuator / Berselli, Giovanni; G., Vassura. - ELETTRONICO. - 2:(2011), pp. 179-188. ( ASME SMASIS 2011 Conference on Smart Materials, Adaptive Structures and Intelligent Systems Phoenix, Arizona 18-21 Settembre 2011) [10.1115/smasis2011-5027].
Bond Graph Modeling And Simulation Of A Constant-Force Dielectric Elastomer Actuator
BERSELLI, Giovanni;
2011
Abstract
Constant-Force actuators based on Dielectric Elastomers (DE) can be obtained by coupling a DE film with particular compliant frames whose structural properties must be carefully designed. In any case, the practical achievement of a desired force profile can be quite a challenging task owing to the time-dependent phenomena which affect the DE electromechanical response. Within this scenario, a hyper-viscoelastic model of a rectangular Constant-Force actuator is reported. The model, based on the Bond Graph formalism, can be used as an engineering tool when designing and/or controlling actuators which are expected to work under given nominal conditions. Numerical simulations are provided which predicts the system response to fast changes in activation voltage and actuator position as imposed by an external user.
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