Design of Robust Higher-Order Repetitive Controller Using Phase Lead Compensator

The performance of conventional repetitive controller (RC) deteriorates under frequency variations and system uncertainties. Due to limited bandwidth, it is also a trivial task to stabilize the conventional RC. This paper proposes a higher-order repetitive controller (HORC) with linear phase lead as...

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Bibliographic Details
Published in:IEEE access 2020, Vol.8, p.30603-30614
Main Authors: Jamil, Mohsin, Waris, Asim, Gilani, Syed Omer, Khawaja, Bilal A., Khan, Muhammad Nasir, Raza, Ali
Format: Article
Language:English
Subjects:
Control stability
Control systems
Controllers
Error compensation
Frequency response
Frequency variation
Generators
Harmonic analysis
higher-order repetitive controller
Lead
Linear phase
phase lead
Repetitive controller
Robust control
Signal generators
Stability analysis
Tracking errors
Uncertainty
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Summary:The performance of conventional repetitive controller (RC) deteriorates under frequency variations and system uncertainties. Due to limited bandwidth, it is also a trivial task to stabilize the conventional RC. This paper proposes a higher-order repetitive controller (HORC) with linear phase lead as a stabilizing compensator and zero-phase tracking error (ZPTE) compensator. The periodic signal generator, used by the HORC, offers relatively high gains in the neighborhood of tuned frequency and its harmonics. Stability conditions for higher-order repetitive (HOR) control system, including the phase lead compensator, are presented. The proposed solution is applied to repetitive current control of a two-level grid-connected inverter. Simulation and experimental results show that the HORC designed using the phase lead compensation is robust to frequency variation in reference/disturbance and system uncertainties.
ISSN:2169-3536
2169-3536
DOI:10.1109/ACCESS.2020.2973168