Study on the Shifting Quality of the CVT Tractor under Hydraulic System Failure

Wang, Guangming; Song, Yue; Wang, Jiabo; Chen, Wanqiang; Cao, Yunlian; Wang, Jinxing

doi:10.3390/app10020681

Cited by 10 publications

(7 citation statements)

References 21 publications

(29 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…There are many indicators available for evaluating the quality of the shifting process, such as shifting time, jerk amplitude, interior noise level, and acceleration characteristics. Previous studies have found that jerk and shifting time play a decisive role in shift quality [33][34][35][36]. The control requirements of this study are fast shift time, low jerk, and smooth output torque at the wheel.…”

Section: B Control Requirementmentioning

confidence: 94%

See 1 more Smart Citation

Shifting Process Optimization of Dedicated Hybrid Transmission

Wei

Huang

et al. 2022

IEEE Access

View full text Add to dashboard Cite

The shifting process of a hybrid electric vehicle (HEV) could be implemented by a motor to simplify the control requirement when the clutch is engaged. In order to reduce the vehicle jerk and simplify the clutch control requirement during the shifting process, this paper introduces a 3-speed dedicated hybrid transmission (3DHT) with P1/P3 configuration and a power shift control strategy. A finite-time linear quadratic regulator (LQR) is proposed to smoothly transfer torque and suppress driveline oscillations during the torque transfer process with a maximum jerk of 5.6 m/s 3 . Since the clutch stays engaged, a predictive sliding mode control (SMC) is proposed to track the speed of the sleeve quickly and precisely during the synchronization process, which takes 0.18s and maintains a speed difference of around 1 rpm. Furthermore, a Kalman Filter is utilized to overcome the difficulties associated with side shaft torque measurement and low wheel speed resolution. A simulation is performed in MATLAB/SIMULINK, and the powershift (2nd -> 3rd) is compared with other methods. The comparison indicates that the proposed power shift strategy can reduce the maximum jerk from 14.8 m/s3 to 5.6 m/s3, while the entire shifting process lasts for 0.71s. Therefore, the proposed power shift control strategy effectively improves the shift quality.INDEX TERMS hybrid electric vehicle, power shift, dedicated hybrid transmission, linear quadratic regulator, sliding mode control

show abstract

Section: B Control Requirementmentioning

confidence: 94%

“…𝑲(𝑘) = 𝑷 − (𝑘)𝑯 𝑻 [𝑯𝑷 − (𝑘)𝑯 𝑻 + 𝑹] −𝟏 (33) 𝒙 ̂𝒂(𝑘) = 𝒙 ̂𝑎 − (𝑘) + 𝑲(𝑘)[𝒛(𝑘) − 𝑯𝒙 ̂𝑎 − (𝑘)](34)𝑷(𝑘) = [𝑰 − 𝑲(𝑘)𝑯]𝑷 − (𝑘)(35) …”

unclassified

Shifting Process Optimization of Dedicated Hybrid Transmission

Wei

Huang

et al. 2022

IEEE Access

View full text Add to dashboard Cite

show abstract

“…According to different design principles, different clutch architectures have been devised such as friction clutch 2 , 3 , Electro mechanically clutch taking motor as power source 4 , 5 , hydraulic or electro hydraulic clutch 6 , 7 and electro pneumatic clutch 8 , 9 . To realize clutch engagement or disengagement control, clutch chamber pressure, transmission torque and clutch piston displacement are the mostly used control modes.…”

Section: Introductionmentioning

confidence: 99%

An improved adaptive position tracking strategy for automatic shift actuator with uncertain parameters

Yin,

Wang,

Gao

et al. 2024

Sci Rep

View full text Add to dashboard Cite

Realizing precise and fast position control of the gear is a challenging issue because of its nonlinearity, parameter uncertainty and external disturbance. Therefore, this paper researches the clutch position control considering the influence because of the factor on the system performance. By virtue of the traditional adaptive control method, an improved strategy based on finite time theory is proposed to further improve the convergence rate as well as the position tracking precision. First, a model of electromechanical clutch actuator system is established by theoretical analysis. Then, an enhanced adaptive controller is designed using finite time idea by introducing power function in the virtual control. And parameter update rate is adopted in the control action. Next, the stability of the control system is proved theoretically. Finally, Matlab simulations and experimental bench test are carried out to exhibit the effectiveness of the presented method. The results show that the satisfactory performance has been achieved with accurate position tracking and fast convergence speed.

show abstract

“…In the referenced literatures, different clutch architectures have been proposed and different driving sources for the clutch actuator are designed for automated manual transmissions. 3 – 5 Electro mechanically actuator taking motor as power source is widely adopted in commercial cars or small and mid-sized vehicles. Hydraulic manipulator or electro hydraulic manipulator is an alternative drive form for the automatic mechanical transmission system not only used on the wheeled agricultural tractors but also on the heavy-duty automobile vehicles.…”

Section: Introductionmentioning

confidence: 99%

Research on clutch position control based on backstepping method for small-sized tractors

2023

View full text Add to dashboard Cite

Tractors installed automated manual transmission can avoid discomfort for the drivers because of excessive limbs intervention as well as improve shift quality. Automatic clutch control is critical for the performance of the automated manual transmissions. For a good operation, precise and fast control of clutch position is mandatory. In order to meet these requirements, an enhanced strategy focused on the clutch is presented adopting a simple tracking control method based on the detailed models in this study. Clutch models including DC motor model and mechanical actuator model are established and transformed to a controllable model. On the basis of the control model, a clutch position tracking control scheme is proposed composed of motor control circuit and motor angle tracking controller designed according to the backstepping method. Simulations are carried out in comparation with the internal model control method, and the results demonstrate the effectiveness of the presented control scheme by superior rapidity and accuracy of the controller response for the clutch position tracking system.

show abstract

Study on the Shifting Quality of the CVT Tractor under Hydraulic System Failure

Cited by 10 publications

References 21 publications

Shifting Process Optimization of Dedicated Hybrid Transmission

Shifting Process Optimization of Dedicated Hybrid Transmission

An improved adaptive position tracking strategy for automatic shift actuator with uncertain parameters

Research on clutch position control based on backstepping method for small-sized tractors

Contact Info

Product

Resources

About