Title :
Model predictive control applied to a diesel engine air-path system with dead time
Author :
Maruyama, Tsugito ; Shimura, Tomohiro ; Ejiri, Arata ; Ikai, Yoshiaki ; Shimotani, Keiji
Author_Institution :
Fujitsu Labs. Ltd., Kawasaki, Japan
Abstract :
It is difficult to obtain ideal target tracking when using conventional PID to control Exhaust Gas Recirculation (EGR) and Variable Nozzle Turbocharger (VNT) in diesel engines. One apparent cause is non-linearity due to saturation of EGR and VNT. In this paper, we apply Model Predictive Control (MPC) to overcome this problem by treating the saturation as a constraint condition. In addition, we construct a state observer of plant model including dead time elements represented by Padé approximation to ensure stable model predictive controller. We also achieve an improvement in target tracking precision in transient response and transient mode assessment tests.
Keywords :
approximation theory; control nonlinearities; diesel engines; observers; predictive control; stability; target tracking; transient response; Pade approximation; dead time elements; diesel engine air-path system; exhaust gas recirculation; nonlinearity; plant model; stable model predictive controller; state observer; target tracking precision; transient mode assessment test; transient response; variable nozzle turbocharger; Atmospheric modeling; Control systems; Diesel engines; Mathematical model; Predictive models; Transient response; Air-path system; Dead time; Diesel Engine; EGR; Model Predictive Control; Padé approximation; VNT;
Conference_Titel :
SICE Annual Conference (SICE), 2011 Proceedings of
Conference_Location :
Tokyo
Print_ISBN :
978-1-4577-0714-8
