Optimization of Shift Control Trajectories for Step Gear Automatic Transmissions
ASME Journal of Dynamic Systems, Measurement, and Control, Vol. 139, No. 6, pp. 061005/1-132017New generation of torque converter automatic transmissions (AT) include a large number of gears for improved fuel economy and performance. Control requirements for such a transmission become more demanding, which calls for the development of new shift control optimization tools. A pseudospectral collocation method is used in the paper to optimize AT clutch and engine control trajectories for comfortable and efficient shifts. Since the optimization method requires a smooth formulation of plant model, the emphasized clutch model nonlinearity around the zero slip speed has been found to be a major difficulty to be resolved through proper modeling of the optimization problem. Therefore, different approaches of describing the friction behavior are considered and assessed, starting from simple static models, through dynamics models, towards torque-source approaches subject to the clutch passivity constraint. Apart from the conventional optimization approach based on minimizing the cost function (including the vehicle jerk and clutch energy loss terms), the so-called feasibility approach based on restricting the cost through an inequality constraint is considered, as well. The proposed optimization method has been verified on a characteristic example of 10-speed AT for both single- and double-transition shifts. It has been found out that the clutch passivity constraint-based approach results in numerically most efficient optimizations for a wide range of shift tasks and scenarios. automatic transmission; control; multi-objective optimization; double-transition shift; assessment
Cited by 16
▾
-
[1]
Adaptive coordinated control strategy for improving shift quality under different operating conditions🔗
Proceedings of the Institution of mechanical engineers. Part D, journal of automobile engineering, 2024
-
[2]
Multi-objective parameter optimization strategy based on engine coordinated control for improving shifting quality🔗
Advances in Mechanical Engineering, 2023
-
-
[4]
Pseudo-spectral optimization and model predictive control of vehicle shift process with dual clutch transmission🔗
Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, 2023
-
[5]
Pseudo-spectral optimization and data-driven control of vehicle start process with dual-clutch transmission🔗
Mechanism and Machine Theory, 2022
-
[6]
Multi-objective optimization of gearshift trajectory planning for multi-speed electric vehicles🔗
Engineering optimization (Print), 2021
-
[7]
Upshift optimization control of dedicated hybrid transmission with P2 configuration🔗
Vehicle System Dynamics, 2020
-
-
[9]
Coordinate Receding Horizon Control for the Power-Shift Process of Multispeed Electric Vehicles🔗
IEEE Transactions on Vehicular Technology, 2020
-
[10]
Multi-objective parameter optimization of control profiles for automatic transmission double-transition shifts🔗
Control Engineering Practice, 2019
-
[11]
Optimization-based assessment of automatic transmission double-transition shift controls🔗
Control Engineering Practice, 2018
-
-
-
-
-
ASME Journal of Dynamic Systems, Measurement, and Control, Vol. 139, No. 6, pp. 061005/1-13
2017
Cited by 16
▾
-
[1] Adaptive coordinated control strategy for improving shift quality under different operating conditions🔗Proceedings of the Institution of mechanical engineers. Part D, journal of automobile engineering, 2024
-
[2] Multi-objective parameter optimization strategy based on engine coordinated control for improving shifting quality🔗Advances in Mechanical Engineering, 2023
-
[4] Pseudo-spectral optimization and model predictive control of vehicle shift process with dual clutch transmission🔗Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, 2023
-
[5] Pseudo-spectral optimization and data-driven control of vehicle start process with dual-clutch transmission🔗Mechanism and Machine Theory, 2022
-
[6] Multi-objective optimization of gearshift trajectory planning for multi-speed electric vehicles🔗Engineering optimization (Print), 2021
-
[7] Upshift optimization control of dedicated hybrid transmission with P2 configuration🔗Vehicle System Dynamics, 2020
-
[9] Coordinate Receding Horizon Control for the Power-Shift Process of Multispeed Electric Vehicles🔗IEEE Transactions on Vehicular Technology, 2020
-
[10] Multi-objective parameter optimization of control profiles for automatic transmission double-transition shifts🔗Control Engineering Practice, 2019
-
[11] Optimization-based assessment of automatic transmission double-transition shift controls🔗Control Engineering Practice, 2018