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Friction models incorporating thermal effects in highly precision actuators
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, 2009
Summary
This study introduces two friction models incorporating thermal effects. Model II, which adds a temperature-dependent function to the LuGre model, demonstrates superior accuracy in motion systems.
Area of Science:
- Mechanical Engineering
- Control Systems
- Tribology
Background:
- Friction modeling is crucial for precise motion control.
- Thermal effects can significantly alter friction behavior in dynamic systems.
- Existing models may not adequately capture temperature-dependent friction.
Purpose of the Study:
- To develop and evaluate two new friction models that account for thermal effects.
- To compare the performance of temperature-dependent vs. temperature-independent modeling approaches.
- To assess the applicability of these models in motion control systems.
Main Methods:
- Modification of the LuGre friction model to include thermal dependencies.
- Development of Model I with temperature-dependent LuGre parameters.
- Development of Model II with a temperature-dependent function added to a standard LuGre model.
- Experimental validation of both models under varying thermal conditions.
Main Results:
- Both developed models effectively incorporate thermal effects into friction modeling.
- Model II exhibited higher accuracy compared to Model I in experimental evaluations.
- The models demonstrate potential for integration into motion control algorithms.
Conclusions:
- The proposed models offer improved friction compensation in the presence of temperature variations.
- Model II provides a more accurate representation of temperature-affected friction.
- Integration into motion control systems is recommended for applications with significant temperature fluctuations.
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