Dynamic Coordinated Control Method of Planetary Hybrid Power-Split System

2017 ◽  
pp. 145-165
Author(s):  
Xiaohua Zeng ◽  
Jixin Wang
Keyword(s):  
Control Method ◽  
Coordinated Control ◽  
Hybrid Power ◽  
Power Split ◽  
Split System

Subsection Coordinated Control during Mode Transition for a Compound Power-Split System

2019 ◽  
Author(s):  
Mengna Li ◽  
Zhiguo Zhao ◽  
Lanxing Jiang ◽  
Xuhui Tang
Keyword(s):  
Coordinated Control ◽  
Mode Transition ◽  
Power Split ◽  
Split System

scholarly journals Dynamic Torque Coordinated Control Considering Engine Starting Conditions for a Power-Split Plug-in Hybrid Electric Vehicle

2021 ◽  
Vol 11 (5) ◽  
pp. 2085
Author(s):  
Yanzhao Su ◽  
Minghui Hu ◽  
Jin Huang ◽  
Datong Qin ◽  
Chunyun Fu ◽  
...  
Keyword(s):  
Electric Vehicle ◽  
Hybrid Electric Vehicle ◽  
Control Method ◽  
Feedforward Control ◽  
Coordinated Control ◽  
Power Split ◽  
Before And After ◽  
Starting Conditions ◽  
Hybrid Electric ◽  
The Impact

For a power-split plug-in hybrid electric vehicle (PS-PHEV), the control system cannot effectively reduce jerks under some engine-starting conditions due to the pulsating torque of the engine, elastic characteristics of the transmission, battery power limitations, and the limitation of the maximum torque of the motor. To solve this problem, a dynamic torque-coordinated control method considering engine starting conditions (DTCC-ESC) is proposed in this paper. The proposed DTCC-ESC mainly includes three parts: the engine segment active control before and after engine ignition to minimize the impact of the engine ripple torque on the shocks of the powertrain system; the feedforward control of the engine starting conditions and the feedback control of the engine’s optimal target speed; and the active damping feedback compensation control for system resonance to reduce system vibrations. The results show that the proposed DTCC-ESC can effectively improve driving comfort under different engine starting conditions.

Robust augmented H∞ shift control strategy for power-split system with a two-speed AMT gearbox of a heavy commercial vehicle

2020 ◽  
pp. 095440702097709
Author(s):  
Xiaohua Zeng ◽  
Zhenwei Wang ◽  
Dafeng Song ◽  
Dongpo Yang
Keyword(s):  
Control Strategy ◽  
Commercial Vehicle ◽  
Kinetic Equations ◽  
Substantial Improvement ◽  
Transmission System ◽  
Power Sources ◽  
Shift Control ◽  
Power Split ◽  
Heavy Commercial Vehicle ◽  
Split System

The coordination control of a transmission system has gradually attracted more attention with the development of hybrid electric vehicles. However, nonlinear coupling of multiple power sources, superposition of different dynamic characteristics in multiple components, and withdrawal and intervention for a power-split powertrain with a two-speed automated manual transmission (AMT) gearbox can cause jerk and vibration of the transmission system during the shift, which has higher requirements and challenges for the overall performance improvement of the system. This paper designs a novel, robust, augmented H∞ shift control strategy for a power-split system with a two-speed AMT gearbox of a heavy commercial vehicle and verifies the strategy’s effectiveness with simulations and experiments. First, the dynamic plant model and kinetic equations are established, and the shift is divided into five stages to clearly reveal the jerk and vibration problem. Based on augmented theory, a robust H∞ shift control strategy is proposed. Shift coordination is transformed into a speed tracking problem, and state variable and disturbance are reconstructed to obtain a new augmented system. Simulation and hardware-in-the-loop test are carried out to verify the effectiveness of the strategy, which mainly includes simulation of pneumatic actuator and H∞ control strategy. Results show that the proposed H∞ control strategy can greatly reduce the jerk of the transmission system. The jerk produced by the proposed strategy is decreased from 20.4 to 4.07 m/s3, leading to a substantial improvement of 80%. Therefore, the proposed strategy may offer a theoretical reference for the actual vehicle controller during the shift.

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