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Article

Improved Position Control for an EGR Valve System with Low Control Frequency

1
Department of Electrical Engineering, Pusan National University, Busan 46241, Korea
2
Department of Mechanical Facility Control Engineering, Korea University of Technology and Education, Cheonan, Chungnam 31253, Korea
*
Author to whom correspondence should be addressed.
Energies 2020, 13(2), 457; https://doi.org/10.3390/en13020457
Received: 15 November 2019 / Revised: 8 January 2020 / Accepted: 15 January 2020 / Published: 17 January 2020
(This article belongs to the Special Issue Intelligent Control in Energy Systems Ⅱ)
An exhaust gas recirculation (EGR) valve position control system requires fast response without overshoot, but the low control frequency limits control bandwidth and results in poor position response. A novel EGR valve position control scheme is proposed to improve the position response at low control frequency. This is based on the feedforward controller, but the feedforward control loop is implemented without the position pattern generator or derivative. The proposed method estimates the acceleration command through the relationship between the position controller output, the speed command and the speed limiter, and compensates the cascaded proportional-proportional integral (P-PI) controller. In this method, many operations are not required and noise due to derivative is not generated. This method can improve the position response without much computation and derivative noise at the low control frequency. Experimental results are presented to verify the feasibility of the proposed position control algorithm. View Full-Text
Keywords: position control; EGR valve; feedforward control loop; low control frequency position control; EGR valve; feedforward control loop; low control frequency
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MDPI and ACS Style

Kim, H.-J.; Son, Y.-D.; Kim, J.-M. Improved Position Control for an EGR Valve System with Low Control Frequency. Energies 2020, 13, 457. https://doi.org/10.3390/en13020457

AMA Style

Kim H-J, Son Y-D, Kim J-M. Improved Position Control for an EGR Valve System with Low Control Frequency. Energies. 2020; 13(2):457. https://doi.org/10.3390/en13020457

Chicago/Turabian Style

Kim, Hyeong-Jin; Son, Yung-Deug; Kim, Jang-Mok. 2020. "Improved Position Control for an EGR Valve System with Low Control Frequency" Energies 13, no. 2: 457. https://doi.org/10.3390/en13020457

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