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Thermal effect on piezoelectric stick-slip actuator systems
1School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200237, People's Republic of China.
The Review of Scientific Instruments
|May 2, 2008
Summary
Temperature rise in piezoelectric stick-slip (PZT-SS) actuators impacts motion displacement. Operating PZT-SS actuators at higher voltages minimizes these thermal effects, ensuring optimal performance and precision.
Area of Science:
- Mechanical Engineering
- Materials Science
- Nanotechnology
Background:
- Piezoelectric stick-slip (PZT-SS) actuators offer unlimited range and nanometer resolution.
- Friction is crucial for PZT-SS motion but generates heat, potentially degrading performance.
- Understanding thermal effects is vital for optimizing PZT-SS actuator design and operation.
Purpose of the Study:
- To quantify temperature rise during PZT-SS motion.
- To investigate the impact of this temperature rise on actuator displacement.
- To provide design recommendations for mitigating thermal performance degradation.
Main Methods:
- Developed a custom temperature measurement system using off-the-shelf components.
- Measured temperature rise on a proprietary PZT-SS actuator during stick-slip operation.
- Correlated temperature changes with actuator displacement at varying operating voltages.
Main Results:
- Successfully measured temperature increases up to 0.436°C.
- Observed significant impact on actuator displacement at low operating voltages (~6 V).
- Identified both friction and piezoelectric element operation as sources of heat generation.
Conclusions:
- Temperature rise significantly affects PZT-SS actuator displacement, particularly at lower voltages.
- Recommends operating PZT-SS actuators at higher voltages (~30 V) to minimize thermal impact.
- Heat generation originates from both frictional interfaces and the piezoelectric element itself.
