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  • 한양대학교 기관으로 출판된 최신 SCI급 논문현황 (Web Of Science에서 제공되는 자료)
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SCI Article

Simplified Decoupler-Based Multivariable Controller With a Gain Scheduling Strategy for the Exhaust
Author Shin, Jaewook (Dept Automot Engn); 선우명호 (Dept Automot Engn);
Corresponding Author Info Sunwoo, M (reprint author), Hanyang Univ, Dept Automot Engn, 222 Wangsimni Ro, Seoul 133791, South Korea.
E-mail shsw0907@gmail.com gunbbang3@gmail.com jaeuk321@gmail.com msunwoo@hanyang.ac.kr
Document Type Article
Source JOURNAL OF DYNAMIC SYSTEMS MEASUREMENT AND CONTROL-TRANSACTIONS OF THE ASME Volume:139 Issue:5 Pages:- Published:2017
Times Cited 0
External Information http://dx.doi.org/10.1115/1.4035236
Abstract This paper presents a simplified decoupler-based multivariable controller with a gain scheduling strategy in order to deal with strong nonlinearities and cross-coupled characteristics for exhaust gas recirculation (EGR) and variable geometry turbocharger (VGT) systems in diesel engines. A feedback controller is designed with the gain scheduling strategy, which updates control gains according to engine operating conditions. The gain scheduling strategy is implemented by using a proposed scheduling variable derived from indirect measurements of the EGR mass flow, such as the pressure ratio of the intake, exhaust manifolds, and the exhaust air-to-fuel ratio. The scheduling variable is utilized to estimate static gains of the EGR and VGT systems; it has a large dispersion in various engine operating conditions. Based on the estimated static gains of the plant, the Skogestad internal model control (SIMC) method determines appropriate control gains. The dynamic decoupler is designed to deal with the cross-coupled effects of the EGR and VGT systems by applying a simplified decoupler design method. The simplified decoupler is beneficial for compensating for the dynamics difference between two control loops of the EGR and VGT systems, for example, slow VGT dynamics and fast EGR dynamics. The proposed control algorithm is evaluated through engine experiments. Step test results of set points reveal that root-mean-square (RMS) error of the gain-scheduled feedback controller is reduced by 47% as compared to those of the fixed gain controller. Furthermore, the designed simplified decoupler decreased the tracking error under transients by 14-66% in various engine operating conditions.
Web of Science Categories Automation & Control Systems; Instruments & Instrumentation
Funding BK21 plus program under the Ministry of Education, South Korea [22A20130000045]; National Research Foundation of Korea (NRF) - Korea Government (MEST) [2011-0017495]; Ministry of Knowledge Economy [10039673, 10042633]; Energy Resource R&D Program under th
Language English
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