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非線性時變力作用下液壓缸爬行機理與抑制方法研究
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國家重點基礎(chǔ)研究發(fā)展計劃(973計劃)資助項目(2014CB046405)、國家自然科學基金資助項目(51075349)和河北省自然科學基金資助項目(E2013203161)


Creeping Mechanism and Suppression Methods of Hydraulic Cylinder under Nonlinear Time-varying Force
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    摘要:

    以液壓缸系統(tǒng)為研究對象，研究了爬行現(xiàn)象的產(chǎn)生機理及抑制方法。通過理論研究，揭示了液壓彈簧剛度和摩擦力內(nèi)在的非線性時變規(guī)律及作用機理。用非線性動力學研究方法對實測的液壓缸系統(tǒng)的動態(tài)數(shù)據(jù)進行了深入分析，揭示了液壓彈簧剛度非線性時變特性引起的“跳躍現(xiàn)象”和摩擦力非線性時變特性引起的“極限環(huán)型振蕩”現(xiàn)象。指出非線性液壓彈簧力和非線性摩擦力的共同作用是液壓缸產(chǎn)生低速爬行的主要原因，并提出了相應的抑制措施來有效提高液壓缸的低速傳動性能。

    Abstract:

    The aim of this research is to explore the mechanism and the suppression methods of creeping phenomenon in hydraulic cylinder system. The nonlinear time-varying laws and function mechanism of hydraulic spring stiffness and friction were revealed through theory analysis. Then, with the nonlinear dynamics methods, the measured dynamic data were thoroughly analyzed. The “jump phenomenon” caused by the nonlinear time-varying characteristic of hydraulic spring stiffness and the “l(fā)imit cycle oscillation” caused by the nonlinear time-varying characteristic of friction were revealed. The combined effect of nonlinear hydraulic spring force and nonlinear friction is the main cause for the low-speed creeping of hydraulic cylinder. Moreover, the corresponding suppression measures were proposed to improve the low-speed transmission stability of hydraulic cylinder. The results indicate that the research can make the comprehensive analysis of dynamic characteristics of hydraulic cylinder system more realistic.

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朱 勇,姜萬錄,王 夢,劉志強.非線性時變力作用下液壓缸爬行機理與抑制方法研究[J].農(nóng)業(yè)機械學報,2014,45(3):305-313. Zhu Yong, Jiang Wanlu, Wang Meng, Liu Zhiqiang. Creeping Mechanism and Suppression Methods of Hydraulic Cylinder under Nonlinear Time-varying Force[J]. Transactions of the Chinese Society for Agricultural Machinery,2014,45(3):305-313.

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  • 收稿日期:2013-10-17
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  • 在線發(fā)布日期: 2014-03-10
  • 出版日期: 2014-02-10