State Feedback Speed Controller for Turbocharged Diesel Engine and Its Robustness

In this paper, the full state feedback controllers capable of regulating and tracking the speed trajectory are presented. A fourth order nonlinear mean value model of a 448 kW turbocharged diesel engine published earlier is used for the purpose. For designing controllers, the nonlinear model is linearized and represented in state-space form. Full state feedback controllers capable of meeting varying speed demands of drivers are presented. Main focus here is to investigate sensitivity of the controller to the perturbations in the parameters of the original nonlinear model. Suggested controller is shown to be highly insensitive to the parameter variations. This indicates that the controller is likely perform with same accuracy even after significant wear and tear of engine due to its use for years.

Authors:

• Dileep Malkhede
• Bhartendu Seth

Keywords:

• Diesel engine model
• Engine speed control
• State feedback controller
• Controller robustness.

References:

[1] Krutov V.I. "Automotive Control of Internal Combustion Engines",
Mir Publishers, Moscow, 1987.
[2] D. N. Malkhede, B. Seth and H.C. Dhariwal, ÔÇÿMean Value Model
andControl of a Marine Turbocharged Diesel Engine,'' SAE
TechnicalPaper No. 2005-01-3889, 2005.
[3] Guzzella L. and Amstutz A.,Control of Diesel Engines, IEEEControl
Systems Magazine, Vol. 8, No. 9, pp. 55-71, 1998.
[4] Christen Urs, Vantine Katie and Collings Nick, Event-based Mean-
Value Modelling of DI Diesel Engines for Controller Design, SAE
Paper No. 2001-01-1242, 2001.
[5] J. J. Moskwa and J.K. Hedrick, ``Automotive Engine Modeling for
Real Time Control Application,'' in Proc. of the 1987, IEEEAmerican
Control Conf., pp. 341-346, 1987.
[6] M. Kao and J.J. Moskwa, ``Nonlinear Diesel Engine Control and
Cylinder Pressure Observation,'' Journal of Dynamic Systems,
Measurement and Control, Vol. 117, Pages 183-192, June, 1995.
[7] K. Ogata, Modern Control Engineering, Prentice Hall of India, 4th
edition, 2002.