Abstract
A novel piezoelectric actuator using a two-stage flexure hinge structure is proposed in this paper, which is used in a compact and high-precision electromechanical field. The two-stage flexure hinge structure is used to provide horizontal thrust and vertical clamping force to the driving feet, which solves the problems of unstable clamping force and insufficient load capacity in traditional stick-slip piezoelectric actuators. Firstly, the main structure of the driver and the working process under the triangular wave excitation voltage are briefly introduced. Secondly, after many simulation tests, the structure of the actuator is optimized and the stability of the structure in providing clamping force is verified. Finally, through the research of the operating performance, when the amplitude is 150 V and the frequency is 3.25 kHz as the excitation source, the maximum speed can reach 338 mm/s and can bear about 3 kg load. It can be seen from the analysis that the two-stage flexure hinge structure can improve the displacement trajectory.
Highlights
Design and Locomotion Study of Piezoelectric actuators (PEAs) have the merits of strong electromagnetic compatibility, small size, high control precision, large output force, flexible design, and selflocking, etc. [1,2,3,4]
PEAs can be separated into direct drive type, inchworm type, resonant type, etc. [11,12,13,14,15]
The larger the hinge radius is in the allowable range, the smaller the loss of the lever structure on the hinge, which increases the horizontal displacement of the slider and improves the driving ability of the PEA
Summary
Design and Locomotion Study of Piezoelectric actuators (PEAs) have the merits of strong electromagnetic compatibility, small size, high control precision, large output force, flexible design, and selflocking, etc. [1,2,3,4]. Design and Locomotion Study of Piezoelectric actuators (PEAs) have the merits of strong electromagnetic compatibility, small size, high control precision, large output force, flexible design, and selflocking, etc. Compared with the inchworm type, the structure of the stick-slip type is relatively simple and easy to control, but its output performance is weak [19,20]. The derivation and calculation of the formula theoretical arefirst, carried and the simulation verification theoretical areformula carried out andout thenfirst, the simulation verification shows that the shows that the PEA has the merit of improving the clamping force. The structure of the lever in theofPEA lever in the is parameterized to improve the output performance of the PEA.
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