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An alternative design approach for Fractional Order Internal Model Controllers for time delay systems
C I Muresan1, I Birs1,2,3, R De Keyser2,3
1Automation Department, Technical University of Cluj-Napoca, Memorandumului 28, 400114 Cluj-Napoca, Romania.
Journal of Advanced Research
|July 1, 2021
Summary
This study introduces a new Fractional Order Internal Model Control (FO-IMC) design for time delay systems. The novel method improves performance over existing FO-IMC tuning strategies.
Area of Science:
- Control Engineering
- Fractional Calculus
- System Identification
Background:
- Fractional Order Internal Model Control (FO-IMC) offers advanced control capabilities.
- Implementing FO-IMC in systems with time delays necessitates approximations for fractional terms and delays.
Purpose of the Study:
- Propose an alternative FO-IMC controller design procedure.
- Introduce a novel approximation method for process time delays.
- Demonstrate the method's efficiency and suitability for time-delay systems.
Main Methods:
- Develop generalized IMC control laws analytically.
- Utilize a Non-Rational Transfer Function approach for time delay approximation.
Main Results:
- Validate the proposed method with numerical examples.
- Experimentally verify the control strategy on a vertical take-off and landing unit.
- Compare performance against Taylor series approximation methods for FO-IMC.
Conclusions:
- The proposed method is validated through both numerical and experimental results.
- The new FO-IMC design demonstrates superior closed-loop performance.
- This work extends the FO-IMC control field with a viable alternative design strategy.
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