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Advanced controller design for quasi-LPV systems applied to automotive engine control

Abstract : My PhD in Automatic Control is part of the research theme “Transport” of the LAMIH. The objective is to improve the functioning of the gasoline engines, mainly by reducing the fuel consumption and the pollution. With this ecologic and economic challenge, and taking into account the new norms and the short-term strategies of the industry (scandal of Volkswagen...), new controllers have to be designed to control the air valve and the fuel injection inside the engine. Considering the highly nonlinear aspect of the system, the Takagi-Sugeno representation and the theoretical background of the LAMIH have been used. A first controller is designed to solve the problem of idle engine speed. However, the complexity of the system forces the use of a controller that is very costly from a computational point of view. An alternative controller is then designed in order to be implemented inside the embedded computer of the engine. A second controller is obtained to maintain the air-fuel ratio in stoichiometric proportions in order to reduce the pollution. This system being subject to a variable transport delay, a change of domain is realized to make this delay constant, and to design a simple and efficient controller. Real-time experiments have been realized on the engine test bench of the LAMIH in order to validate the presented methodology.
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Submitted on : Wednesday, March 28, 2018 - 2:17:07 PM
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Thomas Laurain. Advanced controller design for quasi-LPV systems applied to automotive engine control. Thermics [physics.class-ph]. Université de Valenciennes et du Hainaut-Cambresis, 2017. English. ⟨NNT : 2017VALE0033⟩. ⟨tel-01745651⟩

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