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Optimized Design of a Sub-Arc-Second Micro-Drive Rotary Mechanism Based on the Swarm Optimization Algorithm.
Na Zhang1, Dongmei Wang1, Kai Li2
1The Art College, Xi'an University of Science and Technology, Xi'an 710054, China.
Micromachines
|October 29, 2025
Summary
This study designed and optimized a micro-drive rotary mechanism using piezoelectric ceramics for ultra-precision positioning. The optimized mechanism achieves maximum rotation angle and enhanced compensation range, improving positioning accuracy.
Area of Science:
- Mechanical Engineering
- Mechatronics
- Precision Engineering
Background:
- Micro-motion mechanisms often suffer from limited movement strokes and low positioning accuracy.
- Research into sub-arc-second precision micro-drive mechanisms remains limited.
- Existing designs may exhibit parasitic motion or non-motion direction forces.
Purpose of the Study:
- To design a micro-drive rotary mechanism with an optimized rotation angle and increased compensation range.
- To address limitations of existing micro-drive mechanisms, focusing on precision and stroke.
- To investigate the performance of the structurally optimized mechanism.
Main Methods:
- Designed a micro-drive rotary mechanism converting linear piezoelectric motion to rotary motion using flexure hinges.
- Employed the particle swarm optimization algorithm for structural optimization.
- Conducted kinematic and drive performance analyses.
- Built a performance test platform for experimental verification.
Main Results:
- Achieved maximum output angle through structural optimization.
- Verified positioning performance and dynamic characteristics experimentally.
- Calculated maximum rotary displacements and positioning error.
- Demonstrated accurate conversion of linear motion to rotary motion without parasitic effects.
Conclusions:
- The optimized micro-drive rotary mechanism offers improved performance for ultra-precision positioning.
- The design provides a larger rotation angle and compensation range compared to conventional mechanisms.
- This research offers valuable insights for the development of high-precision micro-drive systems.
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