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Pressure performance improvement by dual-mode control in digital pump/motor

基于双模式控制的数字泵/马达压力特性优化研究

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Abstract

Due to the advantages of low cost, fast response and pollution resistance, digital hydraulic pump/motor can replace conventional variable hydraulic pump/motor in many application fields. However, digital hydraulic components produce large hydraulic impact at variable moments, which will shorten the service life of mechanical components. Through the simulation analysis of the variable process of digital pump/motor, it is found that the discontinuous flow caused by displacement step changes is the fundamental cause of hydraulic impact. The data analysis results of experimental tests are in good agreement with the simulation analysis results. In view of hydraulic secondary components, a variable control method based on dual-mode operating characteristics is proposed. The TOPSIS algorithm is used to give comprehensive evaluation of the displacement control results after this method. The results show that the control quality of digital pump/motor after adopting the control method has been effectively improved, with an average improvement of about 40%.

摘要

数字式液压泵/马达具有成本低、响应快、耐污染等优点, 在很多应用领域可以代替常规的变量 泵/马达。然而, 数字液压元件在变量瞬间产生较大的液压冲击, 会缩短机械元件的使用寿命。通过对 数字泵/马达的变量过程进行仿真分析后发现, 排量阶梯变化导致的流量不连续是产生液压冲击的根 本原因, 且实验测试的数据分析结果与仿真分析结论吻合度较高。结合液压二次元件的特点, 提出了 基于双模式工作特性的变量控制方法, 利用TOPSIS 算法对采用该方法后的排量控制结果进行综合评 价, 结果表明, 采用该组合方法后的数字泵/马达的控制品质得到了有效的提高, 平均提高约40%。

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Authors and Affiliations

  1. School of Mechanical and Aerospace Engineering, Jilin University, Changchun, 130022, China

    Chun-shuang Li  (李春爽), Xin Wang  (王昕), Hai-bo Qi  (齐海波) & Xin-hui Liu  (刘昕晖)

  2. Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, M5S 2E8, Canada

    Xin Wang  (王昕) & Xin-yu Liu  (刘新宇)

Authors
  1. Chun-shuang Li  (李春爽)
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  2. Xin Wang  (王昕)
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  3. Hai-bo Qi  (齐海波)
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  4. Xin-yu Liu  (刘新宇)
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  5. Xin-hui Liu  (刘昕晖)
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Correspondence to Xin Wang  (王昕) or Xin-hui Liu  (刘昕晖).

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Foundation item

Project(51405183) supported by the National Natural Science Foundation of China

Contributors

The idea and the overarching research goals were developed by WANG Xin and LIU Xin-hui. WANG Xin and LI Chun-shuang performed the theoretical derivation. WANG Xin, LI Chun-shuang, and QI Hai-bo provided and analyzed the experiment data. LIU Xin-yu provided suggestions and ideas on the control method. The initial draft of the manuscript was written by WANG Xin and LI Chun-shuang. LIU Xin-yu edited the draft of manuscript. All authors replied to reviewers’ comments and revised the final version.

Conflict of interest

LI Chun-shuang, WANG Xin, QI Hai-bo, LIU Xin-yu and LIU Xin-hui declare that they have no conflict of interest.

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Li, Cs., Wang, X., Qi, Hb. et al. Pressure performance improvement by dual-mode control in digital pump/motor. J. Cent. South Univ. 27, 2628–2642 (2020). https://doi.org/10.1007/s11771-020-4487-7

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  • DOI: https://doi.org/10.1007/s11771-020-4487-7

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