Modeling and optimization of the electromechanical behavior of an ionic polymer–metal composite

The electroactive behavior of an ionic polymer–metal composite (IPMC) actuator was modeled and the optimum design parameters for actuation were also studied. An actuation model characterizing the mechanical response of the IPMC under a given electrical field was proposed considering the electro-chemical parameters. To find the optimum conditions maximizing the tip deflection and blocking force, a multivariable constrained optimization equation was proposed in which the saturation level of hydration, applied voltage and the thickness of IPMC were used as decision variables. IPMC samples with variable thickness were manufactured based on a Nafion membrane and the effect of decision variables on the tip deflection, blocking force and response time of the IPMC was studied. The proposed model and the simulation of optimization were validated by experiment.

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