Shifting quality analysis of unmanned tractor equipped with series hydro-mechanical transmission

IF 0.8 4区工程技术 Q4 ENGINEERING, MECHANICAL

Transactions of The Canadian Society for Mechanical Engineering Pub Date : 2024-03-05 DOI:10.1139/tcsme-2023-0123

Xiaohan Chen, Yehui Zhao, Kuan Liu, Guangming Wang, Yue Song, Prasun Chakrabarti

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引用次数: 0

Abstract

The series hydro-mechanical transmission (HMT) can improve the power performance and fuel economy of unmanned tractors at a lower cost. However, its shifting impact problem needs to be solved before it can be applied in practice. In this study, the control parameters of the HMT power-shift system were optimized from the perspectives of energy loss and driving comfort to improve the shifting quality of the transmission. First, the powertrain of the HMT was introduced. Second, a shifting dynamics model of the HMT was established and experimentally validated. Third, based on the single-factor simulation results, the influence of each factor on the shifting quality of the tractor was analyzed. Finally, a matching strategy for shifting parameters was proposed, and related simulation analysis was conducted on the shifting quality under plowing conditions. Compared to the standard parameters, the results show that the optimized shift parameters reduce the sliding friction work of the clutch under 9 operating conditions as well as the peak acceleration of the tractor under 12 operating conditions. In summary, the parameter-matching method proposed in this study was effective and provided theoretical and methodological support for the development of HMT and its control system for unmanned tractors.

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配备串联液力机械变速器的无人驾驶拖拉机的换挡质量分析

串联式液力机械变速器（HMT）能以较低的成本改善无人驾驶拖拉机的动力性能和燃油经济性。然而，在实际应用之前，需要解决其换挡冲击问题。本研究从能量损失和驾驶舒适性的角度出发，对 HMT 动力换挡系统的控制参数进行了优化，以提高变速器的换挡质量。首先，介绍了 HMT 的动力系统。其次，建立并通过实验验证了 HMT 的换挡动力学模型。第三，基于单因素模拟结果，分析了各因素对拖拉机换挡质量的影响。最后，提出了换挡参数的匹配策略，并对耕地条件下的换挡质量进行了相关仿真分析。结果表明，与标准参数相比，优化后的换挡参数在 9 种工况下降低了离合器的滑动摩擦功，在 12 种工况下降低了拖拉机的峰值加速度。总之，本研究提出的参数匹配方法是有效的，为无人驾驶拖拉机 HMT 及其控制系统的开发提供了理论和方法支持。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Transactions of The Canadian Society for Mechanical Engineering 工程技术-工程：机械

CiteScore

2.30

自引率

0.00%

发文量

审稿时长

5 months

期刊介绍： Published since 1972, Transactions of the Canadian Society for Mechanical Engineering is a quarterly journal that publishes comprehensive research articles and notes in the broad field of mechanical engineering. New advances in energy systems, biomechanics, engineering analysis and design, environmental engineering, materials technology, advanced manufacturing, mechatronics, MEMS, nanotechnology, thermo-fluids engineering, and transportation systems are featured.