Experimental evaluation of a hybrid MPC strategy for vehicle start-up with an Automated Manual Transmission

Amari, Rachid; Tona, Paolino; Alamir, Mazen

doi:10.23919/ecc.2009.7075071

Cited by 10 publications

(5 citation statements)

References 9 publications

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“…Various vehicle safety systems are constantly improved and applied, such as Hill Start Assist (HSA), anti-lock braking systems (ABSs), and automatic mechanical transmission (AMTs) [1], [2]. An automatic mechanical transmission (AMT) is a type of automatic shifting control mechanism based on the original dried frictional flake's clutch and fixed-shaft geared manual transmission to realize automatic operation of transmission selection and shifting [3]. An AMT has the advantages of both an automatic transmission (AT) and manual transmission (MT) in terms of efficiency, cost, simplicity, and ease of manufacture [4].…”

Section: Introductionmentioning

confidence: 99%

Two-Layer Structure Control of an Automatic Mechanical Transmission Clutch During Hill Start for Heavy-Duty Vehicles

Wang

et al. 2020

IEEE Access

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The engagement control of an automatic mechanical transmission (AMT) clutch during the hill start of a heavy-duty vehicle has a significant impact on the comfort, safety and service life of the vehicle. However, the control effect of a traditional control strategy can be easily affected by interference (clutch wear, temperature). Therefore, this paper proposes a two-layer structure control strategy based on an AMT clutch automatic actuator with the clutch engagement speed as the control target. First, the clutch automatic actuator is designed and the governing characteristics of the diesel engine and the control characteristics of the solenoid valve are studied. Second, a logic threshold control method and PID control method are adopted in the proposed two-layer structure control method. Moreover, the robustness of the proposed control algorithm is validated by a co-simulation platform (TruckSim, MATLAB/Simulink). Finally, experimental research under different slopes (13% and 22%) is carried out to verify the simulation results. The experimental results prove that compared with a single-layer control strategy, the two-layer control strategy proposed in this paper can shorten the start time by more than 10%, and reduce the vehicle start-up jerking by approximately 20%, which significantly improves the performance of the vehicle in the hill start process.

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Section: Introductionmentioning

confidence: 99%

Two-Layer Structure Control of an Automatic Mechanical Transmission Clutch During Hill Start for Heavy-Duty Vehicles

Wang

et al. 2020

IEEE Access

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“…An automatic mechanical transmission (AMT) is a type of automatic shifting control mechanism based on the original dried frictional flake's clutch and fixed-shaft geared manual transmission to realize the automatic operation of transmission selection and shifting [1]. An AMT has the advantages of both an automatic transmission (AT) and a manual transmission (MT) in terms of efficiency, cost, simplicity and ease of manufacture [2].…”

Section: Introductionmentioning

confidence: 99%

Double layer control for AMT clutch in commercial vehicle starting: design and experiment

Song¹,

Wang²,

Liu³

et al. 2019

SV-JME

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Engagement control of an automatic mechanical transmission clutch during vehicle start-up has important influences on the safety, comfort, service life, energy consumption, and emissions of the vehicle. However, all existing control strategies use single-layer control, which leads to poor temperature adaptability. This paper develops a double-layer control strategy based on an automatic actuator to improve vehicle start-up performance. The governing characteristics of a diesel engine with a variable-speed governor are studied. The working principles and a model of the automatic actuator are described. A simulation of vehicle start-up is constructed and tested. Finally, the double-layer control strategy is verified in an experimental vehicle. The experimental and simulation results show that the double-layer control strategy provides shorter start times, less jerking, and lower friction, thereby demonstrating its effectiveness and practicability. Keywords: automatic mechanical transmission, start-up process, clutch engagement control, double-layer control Highlights • A double-layer control strategy is designed based on an automatic clutch actuator and controller. • Temperature changes affect clutch engagement performance during the vehicle start-up process. • Comparative outcomes verify the benefits of our scheme in terms of start time, jerking and friction work. • Experiments with an actual vehicle further validate the proposed control strategy.

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“…The factors influencing the clutch judder, including the internal factors (the friction characteristic, damping and backlash) and the external factors (the engine torque fluctuation and applied oil pressure fluctuation), were studied by Zhang et al, 5 who showed that the clutch judder is dependent on the slope of the friction coefficient, the static friction coefficient, the system damping, the applied oil pressure and the engine torque fluctuation. An experimental evaluation presented for an MPC algorithm controlling the power train dynamics in vehicles with automated manual transmissions was discussed by Amari et al, 6 which enabled online optimization by using suboptimal solutions directly linked to the accelerator pedal position. A modal logic called the logic of intention and attempt was presented by Lorini and Herzig, 7 which provided a formal analysis of the relation between the intention and the action and highlighted the pivotal role of attempt in the action execution.…”

Section: Introductionmentioning

confidence: 99%

Optimal control of dry clutch engagement based on the driver’s starting intentions

Dai

Zhang

et al. 2012

Proceedings of the Institution of Mechanical Engineers, Part D:

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This paper explores the association between the driver’s starting intentions and control of dry clutch engagement during the vehicle launch in order to develop an intelligent automated mechanical transmission system. The optimal engagement laws are deduced by finding a compromise between the friction loss, the shock intensity, the engine torque and the engine angular acceleration, based upon the extremum value theorem. The optimal parameters of clutch engagement are adjusted for the value of the shock intensity. The driver’s starting intentions, which can be divided into three patterns, namely fast starting, medium-speed starting and slow starting, are associated with optimal control of clutch engagement according to fuzzy control theory. It is demonstrated that optimal control of dry clutch engagement can reflect the driver’s starting intentions correctly. The obtained optimal accelerator opening has more advantages than the actual accelerator opening, which can be adopted as the ideal input of the vehicle with an intelligent automated mechanical transmission system.

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Experimental evaluation of a hybrid MPC strategy for vehicle start-up with an Automated Manual Transmission

Cited by 10 publications

References 9 publications

Two-Layer Structure Control of an Automatic Mechanical Transmission Clutch During Hill Start for Heavy-Duty Vehicles

Two-Layer Structure Control of an Automatic Mechanical Transmission Clutch During Hill Start for Heavy-Duty Vehicles

Double layer control for AMT clutch in commercial vehicle starting: design and experiment

Optimal control of dry clutch engagement based on the driver’s starting intentions

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