Ms. Dandan Wang Profile

Dandan Wang

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Proceedings Article | 1 December 2023 Paper

Research on antislip control in P2.5 hybrid vehicles

Yiqiang Liu, Dandan Wang, Junchao Jing, Weishan Huang, Yihan Yang

Proceedings Volume 12940, 129400V (2023) https://doi.org/10.1117/12.3010573

KEYWORDS: Control systems, Tunable filters, Adhesion, Roads, Hybrid vehicles, Feedback control, Vehicle control, Thermal stability, Signal processing, Signal detection

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The anti-slip strategy of the P2.5 hybrid system is based on the anti-slip condition determination, the anti-slip torque limit control and anti-slip torque filter control and the clutch coordination. The specific contents are as below: The anti-slip condition determination. The maximum allowable requested torque limit is calculated in advance according to the current ambient temperature, slope, steering angle, speed and other conditions for anti-slip feedforward control, so as to avoid the vehicle slip on the low adhesion road surface. The anti-slip torque limit control. When the body stability system works normally, the anti-slip control is handed over to the body stability system for control. When the body stability system is not working properly, the vehicle controller performs closed-loop control according to the slip error. According to the speed difference between the front wheel and the rear wheel, the acceleration of the left front wheel and the right front wheel, the anti-slip grades are judged and the anti-slip torque is limited based on the difference between the target speed of the output shaft and the actual speed of the actual output shaft and the change rate. The anti-slip torque filter control. In order to rapidly reduce the wheel end driving force to suppress the slip, the torque filtering speed is fast enough to meet the requirements, and the torque filtering at this time needs to be distinguished from the torque filtering at normal times. In order to avoid the frequent jump of the torque filter coefficient caused by anti-slip, the torque filter coefficient calculated by anti-slip is used only when the requested torque and anti-slip torque limit are greater than the threshold. The vehicle results are conducted and show that the anti-slip control strategy can meet the request of the driver and the good drivability performance can be achieved.

Proceedings Article | 1 June 2023 Paper

Research on coordinated control of mode transition in dual-drive hybrid system

Yiqiang Liu, Junchao Jing, Dandan Wang, Zhengxing Dai, Weiwei Lu, Weishan Huang

Proceedings Volume 12718, 1271806 (2023) https://doi.org/10.1117/12.2681548

KEYWORDS: Control systems, Process control, Switching, Systems modeling, System integration

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Due to the high economy and drivability performance objectives, the dual-drive hybrid system which has two motors is developed. In the diverse conditions, the drive modes which are on account of the engine status, the requested driver torque and power, C0 status are presented. The unique challenge of the dual-drive hybrid system is drive modes transition. Specifically, the path transition from the electric mode control to parallel mode control in the acceleration and from parallel mode to electric mode in the brake acceleration. The drive mode control process is divided into five control phases. Finally, tests are successfully performed in the real vehicles to prove that the drivability performance are greatly improved and the innovative control strategy is also demonstrated.

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