关键词: 机械制造工艺与设备, 精密驱动器, 惯性冲击, 压电双晶片, 悬臂, 有限元

Abstract: A new precise actuator with 2 degrees of freedom for translational and rotational motions actuated by the impact force of an endloaded piezoelectric bimorph cantilever was proposed. The dynamic characteristics of the piezoelectric bimorph was studied by FEM and experimental measurements. A control system of the actuator based on the fixedfrequency and adjustableamplitude voltage was tested. The actuator performance on translational and ratational motions were measured. Results show that the proposed actuator is charaterized by simple structure, large travel range, strong driving ability and high positioning resolution. Its cost is estimated only 1% of the traditional impact actuators.

Key words: mechanical manufacturing engineering and equipment, precise actuator, impact drive, piezoelectric bimorph, cantilever, finite element