NDLI: Air–fuel ratio control of lean-burn SI engines using the LPV-based fuzzy technique

Content Provider	IET Digital Library
Author	Wu, Hsiu Ming Tafreshi, Reza
Abstract	Control of air–fuel ratio (AFR) plays a key role in the minimisation of the carbon dioxide and harmful pollutant emissions and maximisation of fuel economy. An inherent time-varying delay existing in lean-burn spark ignition (SI) engines is a major challenge for the AFR control. Herein an unstable internal dynamics with a parameter dependent system caused by time delay is established to represent a dominating feature of AFR. The proposed control scheme, LPV-based fuzzy control technique, combines the features of LPV and fuzzy control to deal with the unstable internal dynamics of an AFR system with external disturbances and a high level of uncertainty in system parameters. Based on the desired error dynamics, an LPV dynamic error consisting of the unstable state and the AFR tracking error is determined. Subsequently, the proposed fuzzy control algorithm through a look-up table is used to stabilise the LPV dynamic error. Then, the tracking error moves along the desired error dynamics towards zero. The system stability is assured via Lyapunov stability criteria. Finally, the simulation results demonstrate the effectiveness and robustness of the proposed control scheme under different operating conditions. Also, compared with the baseline controller, i.e. proportional–integral controller with Smith predictor, demonstrates its superiority.
Starting Page	1414
Ending Page	1420
Page Count	7
ISSN	17518644
Volume Number	12
e-ISSN	17518652
Issue Number	Issue 10, Jul (2018)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-cta/12/10
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-cta.2017.0063
Journal	IET Control Theory & Applications
Publisher Date	2018-03-07
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	AFR Control AFR System AFR Tracking Error Air Pollution Control Air-fuel Ratio Control Baseline Controller Carbon Dioxide Minimization Combinatorial Mathematics Control of Heat System Control System Analysis Delay System Distributed Parameter Control System Engines Error Dynamics Fuel Economy Fuel Economy Maximization Fuzzy Control Fuzzy Control Algorithm Fuzzy Set Theory Fuzzy System Fuzzy System Theory Gain-scheduled Multivariable Controller Ignition Inherent Time-varying Delay Internal Combustion Engines Lean-burn SI Engines Lean-burn Spark Ignition Engines Linear Parameter Varying System Linear Parameter Varying Technique Linguistic Rules Look-up Table LPV Dynamic Error LPV-based Fuzzy Control Technique Lyapunov Method Lyapunov Stability Criteria Multivariable Control System Nonlinear Control System Nonlinear Mapping Parameter Dependent Problem Parameter Dependent System Pollutant Emission Minimization Proportional-integral Controller Robust Control Robust Control Algorithm Smith Predictor Sparks Stability Criteria Stability in Control Theory Synthesis Method System Parameter Uncertainty System Stability Systematic Strategy Time Varying Control System Time Varying System Uncertain System Unstable Internal Dynamics Unstable State
Content Type	Text
Resource Type	Article
Subject	Control and Optimization Control and Systems Engineering Human-Computer Interaction Electrical and Electronic Engineering Computer Science Applications

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