A miniature linear piezoelectric actuator which moves based on inertia friction theory is described in this paper. The authors discuss its driving principle, dynamic model and experimental results.The piezoelectric ac...A miniature linear piezoelectric actuator which moves based on inertia friction theory is described in this paper. The authors discuss its driving principle, dynamic model and experimental results.The piezoelectric actuator includes two piezoelectric elements.Through the sequentially deformations of the two piezo elements, the moving mass slides a miniature displacement. Many strokes will be added to be a large displacement.This type of piezoactuator has advantages in its dimension and motion type,so it can be miniaturized to do micro manipulation or micropositioning in microspace.展开更多
The piezoelectric actuator has been widely used in precision instruments and precision control. However, hysteresis, nonlinearity and creep exist in the actuator, which limit actuator applications and affect accuracy....The piezoelectric actuator has been widely used in precision instruments and precision control. However, hysteresis, nonlinearity and creep exist in the actuator, which limit actuator applications and affect accuracy. This thesis introduces fuzzy control as the algorithm of a closed-loop control system to control the piezoelectric actuator. Fuzzy control can make this closed-looped system not only have high linearity, repeatability, accuracy and few overshoot, but isalso easily used.展开更多
文摘A miniature linear piezoelectric actuator which moves based on inertia friction theory is described in this paper. The authors discuss its driving principle, dynamic model and experimental results.The piezoelectric actuator includes two piezoelectric elements.Through the sequentially deformations of the two piezo elements, the moving mass slides a miniature displacement. Many strokes will be added to be a large displacement.This type of piezoactuator has advantages in its dimension and motion type,so it can be miniaturized to do micro manipulation or micropositioning in microspace.
文摘The piezoelectric actuator has been widely used in precision instruments and precision control. However, hysteresis, nonlinearity and creep exist in the actuator, which limit actuator applications and affect accuracy. This thesis introduces fuzzy control as the algorithm of a closed-loop control system to control the piezoelectric actuator. Fuzzy control can make this closed-looped system not only have high linearity, repeatability, accuracy and few overshoot, but isalso easily used.
