Design and performance of a thermal actuator driving a preloaded linear translation stage
| Autor: | D. J. Hastings, Joshua A. Tarbutton, Stuart T. Smith, Chunjie Fan |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Induction heating Settling time 020208 electrical & electronic engineering General Engineering PID controller Slew rate 02 engineering and technology 021001 nanoscience & nanotechnology Root mean square Control theory 0202 electrical engineering electronic engineering information engineering Overshoot (signal) 0210 nano-technology Actuator |
| Zdroj: | Precision Engineering. 71:187-199 |
| ISSN: | 0141-6359 |
| DOI: | 10.1016/j.precisioneng.2021.03.003 |
| Popis: | A thermally actuated, single-axis, bidirectional translation stage is designed and constructed. To increase the temperature of the thermal actuator, induction heating is used while air-water-mist cooling is used to decrease the temperature. An automated control strategy comprising PID closed loop control (for heating) and On/Off switching between air and mist control (for cooling) is described. The translation stage of this study produces a displacement range of 100 μm and 200 μm (using 240 W and 480 W power sources) in the presence of preloads up to 1 kN. Dependent on the power source used, the root mean square (rms) controller error at steady-state is within 15 nm (240 W) and 35 nm (480 W). No significant variation in the rms controller error was measured in the presence of the different preloads. Dynamic performance is evaluated from step responses over the full range of the actuator as well closed-loop frequency responses. The non-linear, asymmetric aspects of heating and cooling are discussed. Further observations of the system behavior and the preload effect are presented with discussion covering the slew rate, magnitude of overshoot, and controller settling time. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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