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CSME 2023/05
Volume 44 No.2
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155-163
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Speed Ratio Tracking Strategy of an Improved HMCVT for Commercial Vehicles
Guanzheng Wena and Yulong Leib
aState Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun, China
bState Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun, China.
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Abstract:
The traditional hydro-mechanical continuously variable transmission (HMCVT) is mainly used in off-highway vehicles such as tractors. This paper proposes an improved HMCVT that is suitable for commercial vehicles. It has the same functions as the current com-mercial vehicle automatic transmission while making commercial vehicles overcome muddy roads like trac-tors. Furthermore, this paper analyzes the torque, speed, and power characteristics of the improved HMCVT, and proposes a sliding mode control strategy based on H_∞ to solve the problem of speed ratio tracking. It reduces the inherent chattering character-istics of sliding mode control while ensuring the accu-racy and real-time performance of speed ratio tracking. Finally, this paper carries out the simulation verifica-tion by MATLAB/Simulink and compares with the PID speed ratio tracking method, which confirms the excellent performance of the strategy proposed in this paper.
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Keywords: HMCVT, H_∞ control, sliding mode control, speed ratio.
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*Corresponding author; e-mail:
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©
2023
CSME , ISSN 0257-9731
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