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Output speed control for hydro-mechanical continuously variable transmission of tractor

Author

Listed:
  • Zhiqiang Xi
  • Ziying Luo
  • Fuyi Cao
  • Lianbo Niu
  • Liyou Xu

Abstract

In order to improve the speed stability of tractors equipped with hydro-mechanical continuously variable transmission (HMCVT) during field operations, the speed regulation characteristics, torque characteristics, and power diversion characteristics of HMCVT are analyzed. And a comprehensive control strategy for HMCVT output speed is proposed by analyzing the factors affecting the fluctuation of output speed, which combines engine speed control and displacement ratio control of hydraulic speed control system. This strategy adopts fuzzy control to regulate the engine speed to maintain the stability of engine operation. Moreover, adopting feed forward compensation control for speed compensation enhances the anti-interference ability of the hydraulic speed control system. And combined with model predictive control, adjust the swash plate swing angle of the variable pump to reduce the fluctuation of HMCVT output speed. By establishing joint simulation model, the effectiveness of the control strategy was verified using tractor acceleration mode and step load disturbance mode. The results show that the strategy can reduce the fluctuation rate of engine speed and impact degree, shorten the adjustment time, and improve the stability of tractor operating speed.

Suggested Citation

  • Zhiqiang Xi & Ziying Luo & Fuyi Cao & Lianbo Niu & Liyou Xu, 2024. "Output speed control for hydro-mechanical continuously variable transmission of tractor," PLOS ONE, Public Library of Science, vol. 19(9), pages 1-24, September.
    • Handle: RePEc:plo:pone00:0308493
    DOI: 10.1371/journal.pone.0308493
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    References listed on IDEAS

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    1. Kai Lu & Zhixiong Lu, 2022. "Analysis of HMCVT Shift Quality Based on the Engagement Characteristics of Wet Clutch," Agriculture, MDPI, vol. 12(12), pages 1-15, November.
    2. Zhen Zhu & Lingxin Zeng & Long Chen & Rong Zou & Yingfeng Cai, 2022. "Fuzzy Adaptive Energy Management Strategy for a Hybrid Agricultural Tractor Equipped with HMCVT," Agriculture, MDPI, vol. 12(12), pages 1-21, November.
    3. Yu Qian & Zhun Cheng & Zhixiong Lu & Atila Bueno, 2021. "Bench Testing and Modeling Analysis of Optimum Shifting Point of HMCVT," Complexity, Hindawi, vol. 2021, pages 1-13, May.
    4. Yuan Chen & Yu Qian & Zhixiong Lu & Shuang Zhou & Maohua Xiao & Petr Bartos & Yeping Xiong & Guanghu Jin & Wei Zhang & Alina Gavrilu, 2021. "Dynamic Characteristic Analysis and Clutch Engagement Test of HMCVT in the High-Power Tractor," Complexity, Hindawi, vol. 2021, pages 1-8, January.
    5. Jiabo Wang & Zhixiong Lu & Guangming Wang & Ghulam Hussain & Shanhu Zhao & Haijun Zhang & Maohua Xiao, 2023. "Research on Fault Diagnosis of HMCVT Shift Hydraulic System Based on Optimized BPNN and CNN," Agriculture, MDPI, vol. 13(2), pages 1-17, February.
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