Abstract
Dielectric elastomer actuators draw great interest in the emerging technology of soft actuations. This work studied the dynamic performance of a cylindrical dielectric elastomer actuator with coupled loads of tensile forces and variable voltages. Using the Euler-Lagrange equation, the governing equation of the actuator is deduced. The influence of film pre-stretch and spring stiffness on the resonance frequency of cylindrical DEA was studied by using the method of small perturbation of equilibrium position. When the damping viscosity is increased, the dynamic response stabilizes faster. The experimental results show that considering the viscoelastic properties of dielectric materials, the model can improve the accuracy of dynamic response prediction.The modelling and solving methods presented in this paper are helpful to analysethe viscoelastic dynamic response of DEAs, and provide theoretical support for the actuation and control methods of this kind of actuators in practical applications.
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