In Automated Manual Transmissions (AMTs) based on electro-actuated dry-clutch design the frictional material properties, the sensors accuracy, the response of the throwout bearing actuator, and the control strategies to drive the engagement operation are mutual interdependent and only an optimized mechatronic design could lead to an effective target from several points of view: passengers' comfort, fuel economy, system reliability, performance, driving feeling, etc. In such transmissions, the quality of the vehicle propulsion as perceived by driver and passengers is largely dependent on either the quality of the control strategies and the fast dynamics of the clutch subsystems. Furthermore, sensitivity analyses on control schemes for this type of transmissions have shown that uncertainties on the prediction of the actual torque transmitted by the clutch can severely affect the engagement performance. In this paper a high order dynamic model of the powertrain system which includes the electro-hydraulic actuator dynamics has been analysed to design a feedback controller based on multiple Model Predictive Controller (MPC). Simulations of start-up manoeuvres prove the effectiveness of the proposed control strategy and encourage the development of real-time routines for the testing on transmission control unit.

HIGH ORDER DYNAMIC MODEL AND CONTROL STRATEGY OF AUTOMOTIVE POWERTRAIN SYSTEM WITH ELECTRO-HYDRAULIC DRIVEN DRY-CLUTCH

PISATURO, MARIO;SENATORE, ADOLFO
2015

Abstract

In Automated Manual Transmissions (AMTs) based on electro-actuated dry-clutch design the frictional material properties, the sensors accuracy, the response of the throwout bearing actuator, and the control strategies to drive the engagement operation are mutual interdependent and only an optimized mechatronic design could lead to an effective target from several points of view: passengers' comfort, fuel economy, system reliability, performance, driving feeling, etc. In such transmissions, the quality of the vehicle propulsion as perceived by driver and passengers is largely dependent on either the quality of the control strategies and the fast dynamics of the clutch subsystems. Furthermore, sensitivity analyses on control schemes for this type of transmissions have shown that uncertainties on the prediction of the actual torque transmitted by the clutch can severely affect the engagement performance. In this paper a high order dynamic model of the powertrain system which includes the electro-hydraulic actuator dynamics has been analysed to design a feedback controller based on multiple Model Predictive Controller (MPC). Simulations of start-up manoeuvres prove the effectiveness of the proposed control strategy and encourage the development of real-time routines for the testing on transmission control unit.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11386/4642846
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