Optimal Trajectory Planning of Motor Torque and Clutch Slip Speed for Gear Shift of a Two-Speed Electric Vehicle

In order to improve the shift quality of a 2-speed I-AMT of electric vehicle, optimal control is used to generate the reference trajectories of the clutch slip speed and motor torque. The off-line optimization results are fitted and used for online implementation. In order to compensate the disturbances and modeling errors, a PID controller is added to ensure the closed-loop control performance. The proposed controller is almost free of calibration effort, because the feedforward part of the proposed controller considered the simple but dominant system dynamics. Finally the control algorithm is confirmed through large amounts of tests on a complete power train simulation model, and the designed controller can provide satisfactory performance even under large variation of vehicle mass and road grade.

[1]  Huiyan Chen,et al.  Research on Gear-Shift Control Strategy With Clutch Engaged for Fixed Shaft AMT , 2012 .

[2]  John J. Moskwa.  Sliding Mode Control of Automotive Engines , 1993 .

[3]  Gregory N. Washington,et al.  Model Predictive Control of a Two Stage Actuation System using Piezoelectric Actuators for Controllable Industrial and Automotive Brakes and Clutches , 2008 .

[4]  Zongxuan Sun,et al.  Modeling, analysis, and optimal design of the automotive transmission ball capsule system , 2009, 2009 American Control Conference.

[5]  Pingkang Li,et al.  Optimal decoupled control for dry clutch engagement , 2013, 2013 American Control Conference.

[6]  Hong Chen,et al.  Design of Clutch-Slip Controller for Automatic Transmission Using Backstepping , 2011, IEEE/ASME Transactions on Mechatronics.

[7]  Zongxuan Sun,et al.  Automotive Transmission Clutch Fill Control Using a Customized Dynamic Programming Method , 2011 .

[8]  L Chen,et al.  System dynamic modelling and adaptive optimal control for automatic clutch engagement of vehicles , 2002 .

[9]  Pramod P. Khargonekar,et al.  Randomized algorithms for open-loop control of clutch-to-clutch transmissions , 1999 .

[10]  Li Chen,et al.  Model referenced adaptive control to compensate slip-stick transition during clutch engagement , 2011 .

[11]  Josip Kasac,et al.  Optimal control of automated transmission engagement process , 2012, 2012 IEEE International Conference on Control Applications.

[12]  Aldo Sorniotti,et al.  A novel seamless 2-speed transmission system for electric vehicles: Principles and simulation results , 2011 .

[13]  Hong Chen,et al.  The Seamless Gear Shifting Control for Pure Electric Vehicle with 2-speed Inverse-AMT , 2013 .

[14]  M. Kanat Camlibel,et al.  Hybrid optimal control of dry clutch engagement , 2007, Int. J. Control.

[15]  Hong Chen,et al.  Gear ratio optimization and shift control of 2-speed I-AMT in electric vehicle , 2015 .

[16]  Xiaohong Jiao,et al.  Adaptive control for clutch engagement on starting up of vehicle , 2012, Proceedings of the 10th World Congress on Intelligent Control and Automation.

[17]  Luigi Glielmo,et al.  Optimal tracking for automotive dry clutch engagement , 2002 .

[18]  L. Glielmo,et al.  Gearshift control for automated manual transmissions , 2006, IEEE/ASME Transactions on Mechatronics.

[19]  Hong Chen,et al.  A Nonlinear Clutch Pressure Observer for Automatic Transmission: Considering Drive-Shaft Compliance , 2012 .

[20]  Michael Buchholz,et al.  Optimal Control of a Gearshift With a Dual-Clutch Transmission , 2011 .

[21]  Yimin Shao,et al.  Optimization of the shift quality of dual clutch transmission using genetic algorithm , 2010, ICNC.