In this paper, a novel redesign of the prestress mechanism of the stack-type piezoelectric ceramic actuator is provided. Belleville (disc) springs which have a specific height-to-thickness ratio are constructed to generate a constant pre-stress force to the PZT and operated in a special condition. The prestress mechanism is not only used to against the tensile stress but also used to improve the output performance of the actuator. The simulation of the structural behavior is constructed and analyzed in ATILA …
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