| 摘要 |
The invention discloses a piezo-active engine having a stator equipped with independent stator modules (44), each comprising at least one pair of longitudinal piezo-active actuators (12, 14) colinearly arranged inside a mechanical coupling element (16) in the form of a shell (20). Furthermore, it is mounted by means of decoupling resilient links (68, 70), and comprises a central counter-mass (18). In order to provide a closed trajectory for the summits (A and B) to cause by friction the relative displacement of a driven element on a large stroke range, and to position the driven element, these modules use separately or in combination: a translational deformation, obtained when the piezo-active actuators are deformed in opposite directions and produce a tangential displacement of the summits (A and B) of the shell (20) relative to the counter-mass (18), by means of the mass ratio between the counter-mass and the shell; a flexional deformation, obtained when the piezo-active actuators are deformed in the same way and produce a flexion of the shell (20), causing a normal displacement of the summits A and B. |
