QFT 기법을 이용한 승용디젤엔진 공연비 제어 알고리즘 설계 연구
- Title
- QFT 기법을 이용한 승용디젤엔진 공연비 제어 알고리즘 설계 연구
- Other Titles
- Robust Air-to-fuel Ratio Control Algorithm of Passenger Car Diesel Engines Using Quantitative Feedback Theory
- Author
- 선우명호
- Keywords
- 승용디젤엔진; 배기가스 재순환; 정량적 피드백 이론; 공연비 제어; 강인 제어; Passenger car diesel engine; Exhaust gas recirculation; Quantitative feedback theory; Air-to-fuel ratio control; Robust control
- Issue Date
- 2013-05
- Publisher
- 한국자동차공학회
- Citation
- Transactions of KSAE, 2013, 21(3), P.88-97
- Abstract
- This paper presents a robust air-to-fuel ratio (AFR) control algorithm for managing exhaust gas recirculation (EGR) systems. In order to handle production tolerance, deterioration and parameter-varying characteristics of the EGR system, quantitative feedback theory (QFT) is applied for designing the robust AFR control algorithm. A plant model of EGR system is approximated by the first order transfer function plus time-delay (FOPTD) model. EGR valve position and AFR of exhaust gas are used as input/output variables of the plant model. Through engine experiments, parameter uncertainty of the plant model is identified in a fixed engine operating point. Requirement specifications of robust stability and reference tracking performance are defined and these are fulfilled by the following steps: during loop shaping process, a PID controller is designed by using a nominal loop transmission function represented on Nichols chart. Then, the frequency response of closed-loop transfer function is used for designing a prefilter. It is validated that the proposed QFT-based AFR control algorithm successfully satisfy the requirements through experiments of various engine operating points.
- URI
- http://koreascience.or.kr/article/ArticleFullRecord.jsp?cn=JDCGCC_2013_v21n3_88http://hdl.handle.net/20.500.11754/44732
- ISSN
- 1225-6382; 2234-0149
- DOI
- 10.7467/KSAE.2013.21.3.088
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > AUTOMOTIVE ENGINEERING(미래자동차공학과) > Articles
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