Experimental study and electromechanical model analysis of the nonlinear deformation behavior of IPMC actuators |
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| Authors: | Hongguang Liu Ke Xiong Kan Bian Kongjun Zhu |
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| Institution: | 1. State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;Faculty of Civil Engineering and Mechanics, Jiangsu University, Zhenjiang 212013, China;2. State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China |
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| Abstract: | This paper develops analytical electromechani-cal formulas to predict the mechanical deformation of ionic polymer–metal composite (IPMC) cantilever actuators under DC excitation voltages. In this research, IPMC samples with Pt and Ag electrodes were manufactured, and the large non-linear deformation and the effect of curvature on surface electrode resistance of the IPMC samples were investigated experimentally and theoretically. A distributed electrical model was modified for calculating the distribution of voltage along the bending actuator. Then an irreversible thermo-dynamic model that could predict the curvature of a unit part of an IPMC actuator is combined with the electrical model so that an analytical electromechanical model is devel-oped. The electromechanical model is then validated against the experimental results obtained from Pt- and Ag-IPMC actuators under various excitation voltages. The good agree-ment between the electromechanical model and the actuators shows that the analytical electromechanical model can accu-rately describe the large nonlinear quasi-static deflection behavior of IPMC actuators. |
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| Keywords: | Actuator Ionic polymer metal composite Nonlinear deformation Electromechanical model |
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