Study on a nonlinear dynamic characteristic of the positive flow pump in its pilot hydraulic cylinder

IF 2.3 4区工程技术 Q2 ENGINEERING, MECHANICAL

Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering Pub Date : 2024-08-28 DOI:10.1177/09544089241271864

Weiqi Sun, Yong Sang, Lianjie Liao, Luming Jiang, Guoshuai Li, Fuhai Duan

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引用次数: 0

Abstract

The displacement of the positive flow pump is controlled by its pilot hydraulic cylinder. The tracking performance of the pump displacement directly affects the energy saving of the hydraulic excavator through power matching. In this article, a nonlinear dynamic characteristic of the positive flow pump in its pilot hydraulic cylinder is studied to improve the mathematical model for controller design. The concept of relative water hammer is first proposed to describe the relative pressure wave acting on the hydraulic piston to illustrate the mechanism of the nonlinearity. Chaotic motion can be generated by the relative water hammer when the hydraulic piston is in a partial stroke. The mathematical model is derived and its critical parameters are analyzed. The simulation and experimental results verify the existence of the relative water hammer and the effect of each critical parameter on the pilot hydraulic cylinder and the positive flow pump.

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正流量泵先导液压缸非线性动态特性研究

正流量泵的排量由其先导液压缸控制。通过功率匹配，泵排量的跟踪性能直接影响液压挖掘机的节能效果。本文研究了正流量泵先导液压缸的非线性动态特性，以改进控制器设计的数学模型。首先提出了相对水锤的概念来描述作用在液压活塞上的相对压力波，以说明非线性的机理。当液压活塞处于部分行程时，相对水锤会产生混沌运动。推导出了数学模型，并对其关键参数进行了分析。仿真和实验结果验证了相对水锤的存在以及各关键参数对先导液压缸和正流量泵的影响。

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

Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering 工程技术-工程：机械

CiteScore

3.80

自引率

16.70%

发文量

370

审稿时长

6 months

期刊介绍： The Journal of Process Mechanical Engineering publishes high-quality, peer-reviewed papers covering a broad area of mechanical engineering activities associated with the design and operation of process equipment.

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