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System Identification of Conveyor Belt Microwave Drying Process of Polymer Foams Using Electrical Capacitance
Marzieh Hosseini1, Anna Kaasinen1, Mahdi Aliyari Shoorehdeli2
1Department of Applied Physics, University of Eastern Finland, 70211 Kuopio, Finland.
Sensors (Basel, Switzerland)
|November 13, 2021
Summary
This study developed a simplified model for microwave drying of polymer foams using system identification. The model accurately predicts moisture content, enabling effective controller design for industrial applications.
Area of Science:
- Materials Science
- Chemical Engineering
- Control Systems
Background:
- Microwave drying is crucial for polymer foam production in construction.
- Precise moisture control is needed for optimal foam properties.
- Existing models struggle with the complex physics of microwave drying.
Purpose of the Study:
- To develop a simplified, accurate model for microwave drying of polymer foams.
- To enable the design of model-based moisture controllers.
- To utilize system identification for process modeling.
Main Methods:
- System identification techniques were applied to process input-output data.
- Electrical Capacitance Tomography (ECT) was used to measure foam moisture content.
- A state-space model was estimated and validated using experimental data.
Main Results:
- An accurate state-space model of the microwave drying process was successfully estimated.
- The model demonstrated high fidelity in predicting foam moisture content.
- Validation using independent datasets confirmed the model's robustness.
Conclusions:
- The developed model is sufficiently accurate for designing model-based controllers.
- This approach facilitates improved moisture control in industrial microwave drying.
- ECT sensor integration provides effective real-time moisture monitoring.
