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Modeling and Positioning of a PZT Precision Drive System
1College of Mechanical and Electrical Engineering, Northeast Forestry University, Harbin 150040, China. sympic@nefu.edu.cn.
Sensors (Basel, Switzerland)
|November 9, 2017
Summary
This study addresses nonlinear issues in piezoelectric ceramic transducer (PZT) precision drive systems for 3D printing. Mathematical modeling and closed-loop control successfully eliminated hysteresis and creep, enhancing laser focusing precision.
Area of Science:
- Additive Manufacturing
- Control Systems Engineering
- Materials Science
Background:
- Piezoelectric ceramic transducer (PZT) systems in 3D printing exhibit nonlinear positioning issues like hysteresis and creep.
- These nonlinearities significantly degrade the precision of laser focusing systems.
Purpose of the Study:
- To mitigate the negative impact of PZT nonlinearity on precision drive systems.
- To improve the accuracy of laser focusing in 3D printing applications.
Main Methods:
- Mathematical modeling and theoretical analysis of system modules.
- Construction of a micro-displacement measurement circuit using a Position Sensitive Detector (PSD).
- Development of closed-loop control and creep control models.
Main Results:
- System modeling and control algorithms were validated using an XL-80 laser interferometer.
- The developed models and algorithms effectively addressed PZT nonlinearity.
- The precision positioning requirements for the drive system were successfully met.
Conclusions:
- The study demonstrates a viable approach to overcome PZT nonlinearity in precision drive systems.
- The implemented control strategies ensure high-accuracy positioning for demanding applications like laser focusing in 3D printing.
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