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<p>To rigorously evaluate the electromechanical-hydraulic coupling performance of a hydraulic excavator’s working device under authentic operating loads, this study presents a field-data-driven co-simulation framework applied to a 20-ton backhoe hydraulic excavator. Full-scale digging experiments were conducted at the Liuzhou test site, where boom, arm, and bucket cylinder pressures, together with joint angles, were synchronously sampled to back-calculate the real-time excavation resistance. This measured resistance was then imported as an external load into a three-dimensional dynamic model established in ADAMS and bidirectionally coupled with the electro-hydraulic system model developed in AMESim. For three representative digging depths: surface digging, 1&#xa0;M digging, and 2&#xa0;M digging, the maximum discrepancy between simulated and measured cylinder pressures was 6&#xa0;MPa (about 15%), while the correlation coefficients of the pressure traces ranged from 0.907 to 0.975, showing excellent agreement. The observed deviations are primarily attributed to load uncertainty; nevertheless, the proposed model accurately captures the dynamic interaction between the electro-hydraulic system and the mechanical system, offering a reliable experimental foundation for performance assessment and digital-twin applications of hydraulic excavator working device.</p>

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Joint simulation and experimental verification of electromechanical-hydraulic of hydraulic excavator working device

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年11月26日

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  • Mei Xin,
  • Zhigui Ren,
  • Yiding Yu,
  • Yudong Tian,
  • Heng Zhang,
  • Kaitao Ren,
  • Yijian Zhang

摘要

To rigorously evaluate the electromechanical-hydraulic coupling performance of a hydraulic excavator’s working device under authentic operating loads, this study presents a field-data-driven co-simulation framework applied to a 20-ton backhoe hydraulic excavator. Full-scale digging experiments were conducted at the Liuzhou test site, where boom, arm, and bucket cylinder pressures, together with joint angles, were synchronously sampled to back-calculate the real-time excavation resistance. This measured resistance was then imported as an external load into a three-dimensional dynamic model established in ADAMS and bidirectionally coupled with the electro-hydraulic system model developed in AMESim. For three representative digging depths: surface digging, 1 M digging, and 2 M digging, the maximum discrepancy between simulated and measured cylinder pressures was 6 MPa (about 15%), while the correlation coefficients of the pressure traces ranged from 0.907 to 0.975, showing excellent agreement. The observed deviations are primarily attributed to load uncertainty; nevertheless, the proposed model accurately captures the dynamic interaction between the electro-hydraulic system and the mechanical system, offering a reliable experimental foundation for performance assessment and digital-twin applications of hydraulic excavator working device.