A synergistically driven two-step stick-slip driving device and method

By using symmetrically arranged friction heads and drive modules in synergy, and employing a bridge amplification mechanism to suppress backlash, the piezoelectric stick-slip actuator achieves efficient and high-speed motion, solving the backlash problem in existing technologies and improving the efficiency and positioning accuracy of the actuator.

CN115528943BActive Publication Date: 2026-06-16SHANDONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHANDONG UNIV
Filing Date
2022-10-12
Publication Date
2026-06-16

AI Technical Summary

⚠Technical Problem

Existing piezoelectric stick-slip actuators exhibit retraction motion during output displacement, resulting in low driving efficiency, limited positioning accuracy, and issues such as heat generation and wear, making it difficult to achieve efficient and high-speed motion.

⚗Method used

The system employs two symmetrically arranged friction heads and drive modules, which work together to drive the motion unit through a bridge amplification mechanism to suppress retraction. It also utilizes dual-step displacement to improve drive speed and efficiency. The system uses a dual-piezoelectric ceramic collaborative drive method, and the direction of motion is changed by altering the energizing sequence of the drive modules.

🎯Benefits of technology

It effectively suppresses retraction, improves drive speed and efficiency, reduces heat generation and wear, and achieves smooth drive of the motion unit and consistency of forward and reverse motion.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application provides a kind of synergic driving double-step stick-slip driving device and method, it is related to micro-nano precision manufacturing and control technical field, in view of the problem that the output displacement of piezoelectric stick-slip driver exists back movement and leads to low driving efficiency, by configuring two friction heads and two driving modules arranged symmetrically, the back movement is inhibited by synergic driving movement unit, and the friction head can drive the movement unit to move again after inhibiting the back movement of another friction head, double-step displacement is generated to improve driving speed and efficiency.
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