Analysis on the Preload of Diamond Dielectric Elastomer Actuator

The working principle of dielectric elastomer actuator(DEA)is analyzed,and the force-displacement curves of diamond DEA are measured and compared with the total equivalent preload produced by elastic preload parts to determine the elastic preload parts which can make the actuator obtain larger output displacement.Experimental results show that,the diamond actuator can produce a displacement of 21 mm and the area variation ratio of the dielectric elastomer can reach 98% when voltage is applied,and the actuator can retract to its original position when voltage is released.