Study on Coordinated Control Strategy for Seamless Gear Shifting of Two-speed AMT

WANG Ming,SHENG Jixin,DING Fei,ZHANG Bangji,WEN Guilin,ZHANG Nong

Abstract

 For an Automated Manual Transmission (AMT) with clutch inversed for the pure electric vehicle, this paper presented a program that the synchronizer of the AMT was located on the second axis. The seamless gear shifting can be obtained by switching the clutch to the synchronizer. In order to make the output torque of gearbox change smoothly, addressing the vehicle jerk and friction work as the shift performance indexes, different coordinated control strategies were adopted for different stages during shifting: the motor torque remained unchanged in the torque phase, and the clutch torque was controlled coordinately; the speed difference of the clutch was controlled following the target trajectory by motor speed controlled by PID and adaptive fuzzy PID method in the inertial phase. The dynamic model of MATLAB / Simulink was established and simulated, which showed the feasibility and effectiveness of the coordinated control strategy for gear shifting. Compared with the traditional PID controller applied in the inertial phase, the adaptive fuzzy PID controller can effectively improve the shift quality, the max jerk during gear shift and the friction work decreased, the output torque of the transmission changed seamlessly without power interruption, and the comfort of the vehicle was significantly improved.

 

 

Keywords: electric vehicles,  Automated Manual Transmission (AMT),  seamless gear shifting,  adaptive fuzzy PID control,  coordinate control


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References


KNODEL U,STRUBE A,BLESSINGUC,et al. Design and implementation of requirement -driven electric drives [J] . ATZ World- wide,2010,112(6):56-60.

ZHONG Z M,KONG G L,YU Z P,et al. Review on torque interruption and its solution of automated mechanical transmission [J] . Journal of Tongji University (Natural Science),2011,39 (12):1850-1855.(In Chinese)[3] ZHONG Z M,KONG G L,YU Z P,et al. Shifting control of an automated mechanical transmission without using the clutch[J] . International Journal of Automotive Technology,2012,13(3):487-496.[4] WALKER P D,FANG Y,ZHANG N. Dynamics and control of clutchless automated manual ransmissions for electric vehicles[J] . Journal of Vibration and Acoustics,2017,139(6):1-13.

YE J,ZHAO K G,HUANG X D,et al. Motor coordinated shift control for a two -speed uninterrupted shift transmission of pure electric vehicle[J] . Automotive Engineering,2016,38(8):989- 995.(In Chinese)

ZHAO Z G,HE L,YANG Y Y,et al. Estimation of torque transmitted by clutch during shifting process for dry dual clutch transmission [J] . Mechanical Systems and Signal Processing , 2016,75:413-433.

LI G Q,GORGES D. Optimal control of the gear shifting process for shift smoothness in dual-clutch transmissions [J] . Mechanical Systems and Signal Processing,2018,103:23-38.

LI J Q,CHEN J W,WANG Y H,et al. Shift process optimal control of combined clutch in electric vehicles [J] .Journal of Hunan University(Natural Sciences),2016,43(2):23-27.(In Chinese)

TIAN Y,RUAN J G,ZHANG N,et al. Modelling and control of a novel two-speed transmission for electric vehicles[J] . Mechanism and Machine Theory,2018,127:13-32.

HU J J,LI K L,HU M H,et al. Coordination matching control method of AMT gear shifting for pure electric ca[r J] . China Journal of Highway & Transport,2012,5(1):152-158.(In Chinese)

KOROIWA H,OZAKI N,OKADA T,et al. Next generation fuel- efficient automated manual transmission [J] . Hitachi Review, 2004,53(4):205.

GALVAGNO E,VELARDOCCHIA M,VIGLIANI A. Analysis and simulation of a torque assist automated manual transmission[J] . Mechanical Systems& Signal Processing,2011,25:1877-1886.


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