Modelling, Analysis and Simulation of a Novel Automated Manual Transmission with Gearshift Assistant Mechanism

Zhiqiang, Sun; Gao, Bingzhao; Jin, Jiaqi; Sanada, Kazushi

doi:10.1007/s12239-019-0082-z

Cited by 7 publications

(7 citation statements)

References 15 publications

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“…The vehicle upshift model is built on the MATLAB/Simulink simulation platform according to the detailed analysis of the AMT with the gearshift assistant mechanism in [3]. For the parameters used in the simulation process, please refer to Table 1.…”

Section: Resultsmentioning

confidence: 99%

“…Detailed decoupling controller Q design and anti-interference controller cd K design are referred to in [3].…”

Section: Controller Designmentioning

confidence: 99%

“…Automatic mechanical transmission (AMT) based novel structures have drawn rising attention from hybrid and electric vehicle manufacturers [1,2]. An AMT equipped with a shift assist mechanism can enhance the shift quality and the fuel consumption of the traditional AMT by properly coordinating the friction clutch and the motor connected to the output shaft [3]. The auxiliary shifting mechanism added to AMT changed the shifting process in a way that is different compared to the traditional ones, and its performance still needs to be further validated.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Improved Decoupling Control for a Powershift Automatic Mechanical Transmission Employing a Model-Based PID Parameter Autotuning Method

et al. 2020

Self Cite

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Automatic mechanical transmission (AMT) with a gearshift assistant mechanism is a novel transmission architect concept aiming to improve the torque interruption and driveline jerk of AMT. During the shifting process, the shifting performance deteriorates as the varying road gradient and the friction coefficient worsen the coupling effect between the motor torque and the clutch friction torque. This paper focuses on improving the controller’s robustness of AMT with a gearshift assistant mechanism against the perturbed parameters during the stage of torque gap filling. In this paper, a detailed powertrain simulation model was presented. Based on a decoupling controller and a disturbance compensator, proportional-integral-differential (PID) controllers are applied to enhance the robustness and the decoupling effect. The PID parameters are automatically tuned by employing the Nelder-Mead method. In the tuning process, a cost function was established to demonstrate the outputs’ reference tracking performance, and the PID parameters are tuned by minimizing the cost function. Finally, the tuned parameters are stored in PID maps to make them adjustable online. Simulation results show that with the perturbed parameters well estimated, the upshift process was successful and the torque filling effect was also acceptable. The proposed transmission is a promising structure for industry applications.

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Section: Resultsmentioning

confidence: 99%

“…Detailed decoupling controller Q design and anti-interference controller cd K design are referred to in [3].…”

Section: Controller Designmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Improved Decoupling Control for a Powershift Automatic Mechanical Transmission Employing a Model-Based PID Parameter Autotuning Method

et al. 2020

Self Cite

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“…Actually, proper control of driving motor and shift mechanism can facilitate fast and smooth response of shifting [21]. For revealing the requirements of proper shifting control for a clutch-less transmission in EVs, Ref.…”

Section: Introductionmentioning

confidence: 99%

Design, Control, and Validation of Two-Speed Clutchless Automatic Transmission for Electric Vehicle

Liu

Xie

Qin

et al. 2022

IEEE/ASME Trans. Mechatron.

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Two-speed or multiple-speed automatic transmissions can obviously improve the overall manipulating performance in terms of shifting quality and energy efficiency when equipped in electric vehicles (EVs). This study details the design of a two-speed clutch-less automatic transmission (2AT) for EVs and the motor controlled shifting mechanism. Firstly, a novel two-speed clutch automatic transmission is devised with a motor-controlled shifting mechanism, which enables the shift motions and the speed control of the driving motor for synchronization during shifts. Secondly, a coordinated control strategy of the driving motor and controlling motor for shifting is detailed during different shifting processes to achieve fast and smooth shifting. The torque trajectory optimization during synchronizing process is attained by applying the Pontryagin's minimum principle. The simulation and experimental results verify the shifting mechanism design and the shift control algorithm in terms of shift response and smoothness for the designed 2AT.Index Terms-Coordinated control, electric vehicles (EVs), gear shifting control, two-speed automatic transmission (2AT).

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“…In developing and applying an AMT system, a shifting performance similar to that of a general automatic transmission using a torque converter is required. Therefore, most studies on AMT systems have focused on automatic shift quality, such as fast and smooth clutch engagement [16,31,32]. In order to improve the shift quality of AMTs, it is necessary to develop a shift control technology capable of quickly shifting a conventional manual transmission.…”

Section: Introductionmentioning

confidence: 99%

Development of Control System for Automated Manual Transmission of 45-kW Agricultural Tractor

Kim

et al. 2020

Applied Sciences

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This study aims to develop and evaluate an automated manual transmission (AMT) for agricultural tractors with high efficiency and high convenience by using electric actuators. An AMT system to control manual-type shuttle gearboxes and transmissions for tractors is developed by adding a shuttle shifting actuator, a clutch actuator, and a control system to a conventional manual transmission (MT). The clutch actuator is designed using an electric motor and a reduction gear. The AMT control system is developed and experimental tests are conducted to evaluate the performance of the AMT. The results of the performance of the actuator position control demonstrate that the shuttle shifting actuator and clutch actuator are controlled appropriately, achieving a maximum overshoot of less than 5% and 0%, a settling time of less than 0.500 s and 1.50 s, and a steady-state error of less than 1% and 1%, respectively. The performance of the automatic forward and reverse control demonstrates a shift control time of less than 2.50 s and target revolutions per minute (RPM) reaching time of less than 3.00 s. Thus, AMT systems for tractors can be easily developed by applying shuttle shifting actuators, clutch actuators, and a control system to conventional manual transmissions.

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Modelling, Analysis and Simulation of a Novel Automated Manual Transmission with Gearshift Assistant Mechanism

Cited by 7 publications

References 15 publications

Improved Decoupling Control for a Powershift Automatic Mechanical Transmission Employing a Model-Based PID Parameter Autotuning Method

Improved Decoupling Control for a Powershift Automatic Mechanical Transmission Employing a Model-Based PID Parameter Autotuning Method

Design, Control, and Validation of Two-Speed Clutchless Automatic Transmission for Electric Vehicle

Development of Control System for Automated Manual Transmission of 45-kW Agricultural Tractor

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