The piezoelectric actuator shows good control of micro linear displacement, but it cannot directly output the angular displacement. In this paper, an angular displacement piezoelectric actuator is proposed, which can amplify the displacement of the piezoelectric stack and realize angular displacement output just through one piezoelectric stack. Finite element modelling (FEM) simulations were used to analyse the angular displacement and the stress conditions. To verify the results of the FEM simulations, a prototype was manufactured and the experiments were performed. The maximum angle displacement was 0.85° when the driven voltage was 120 V.
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