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Linear Drive Based on Silicon/Ethanol Composite
Tomasz Kapłon1, Andrzej Milecki1
1Institute of Mechanical Technology, Faculty of Mechanical Engineering, Poznan University of Technology, Pl. M. Skłodowskiej-Curie 5, 60-965 Poznan, Poland.
Polymers
|August 28, 2021
Summary
This study introduces a novel silicon/ethanol composite actuator. Closed-loop control achieved precise positioning under 200 µm, demonstrating its potential for accurate mechatronic systems.
Area of Science:
- Materials Science
- Mechanical Engineering
- Control Systems
Background:
- Presents a novel actuator concept utilizing a silicon/ethanol composite within brass bellows.
- The actuator operates via phase change of ethanol encapsulated in silicone rubber.
- This technology offers a unique approach to actuation in mechatronic systems.
Purpose of the Study:
- To describe and test a prototype silicon/ethanol composite actuator.
- To evaluate open-loop and closed-loop control performance.
- To analyze the impact of temperature and control strategies on actuator dynamics.
Main Methods:
- Fabrication and testing of a prototype actuator.
- Utilized laser distance sensors for feedback in open and closed-loop configurations.
- Implemented P- and PI-type controllers for drive positioning experiments.
- Measured internal and ambient temperatures to determine heat flow delays.
- Employed a fan controlled by an automation system to enhance drive dynamics.
Main Results:
- Achieved a positioning accuracy of less than 200 µm in closed-loop control.
- Quantified heat flow delays from the heater to the composite material.
- Demonstrated improved drive dynamics and reduced return time using a fan.
- Presented results from frequency tests of the actuator drive.
Conclusions:
- The silicon/ethanol composite actuator demonstrates effective closed-loop positioning capabilities.
- Temperature monitoring is crucial for understanding actuator response and optimizing performance.
- Control strategies and auxiliary systems like fans can significantly enhance actuator dynamics and precision.
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