Abstract
A new on-line fault detection and isolation (FDI) scheme proposed for engines using an adaptive neural network classifier is evaluated for a wide range of operational modes to check the robustness of the scheme in this paper. The neural classifier is adaptive to cope with the significant parameter uncertainty, disturbances, and environment changes. The developed scheme is capable of diagnosing faults in on-line mode and can be directly implemented in an on-board diagnosis system (hardware). The robustness of the FDI for the closed-loop system with crankshaft speed feedback is investigated by testing it for a wide range of operational modes including robustness against fixed and sinusoidal throttle angle inputs, change in load, change in an engine parameter, and all these changes occurring at the same time. The evaluations are performed using a mean value engine model (MVEM), which is a widely used benchmark model for engine control system and FDI system design. The simulation results confirm the robustness of the proposed method for various uncertainties and disturbances.
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This work was supported by Universities UK, Faculty of Technology and Environment and School of Engineering, Liverpool John Moores University, UK.
Mahavir Singh Sangha received first class B. Eng. (Electrical) degree form University of Jodhpur, India, in 1991 and M. Sc. (Intelligent Control) degree with distinction from Liverpool John Moores University (LJMU), UK, in 2005. He is presently a Ph.D. candidate at LJMU, Liverpool, UK. He worked in an electricity distribution company for about 12 years.
His research interests include fault diagnosis in an automotive engine and neural networks.
Dingli Yu received the B.Eng. degree from Harbin University of Civil Engineering, China, in 1982, the master degree from Jilin University of Technology (JUT), China, in 1986, and the Ph.D. degree from Coventry University, UK, in 1995, all in electrical engineering. He was a lecturer at JUT from 1986 to 1990 before he came to University of Salford as a visiting researcher in 1991. He then worked at Liverpool John Moores University as a post-doctoral researcher since 1995 and became a lecturer in 1998, where he is currently a professor of control systems.
His research interests include fault detection and fault tolerant control of bilinear and nonlinear systems, adaptive neural networks and their control applications, and model predictive control for chemical processes and engine systems.
J. Barry Gomm received the B.Eng. first class degree in electrical and electronic engineering in 1987 and the Ph.D. degree in process fault detection in 1991 from Liverpool John Moores University (LJMU), UK. He joined the academic staff at LJMU in 1991 and is a reader in intelligent control systems.
His research interests include neural networks for modelling, control and fault diagnosis of non-linear processes, intelligent methods for control, system identification, adaptive systems, chemical process, and automotive applications.
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Sangha, M.S., Yu, D. & Gomm, J.B. Robustness assessment and adaptive FDI for car engine. Int. J. Autom. Comput. 5, 109–118 (2008). https://doi.org/10.1007/s11633-008-0109-9
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DOI: https://doi.org/10.1007/s11633-008-0109-9