China Mechanical Engineering

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Multi-level Pressure Switching Displacement Servo Control Systems

CAO Xiaoming3;GUO Baofeng2,3;WANG Pei3;LI Yao3;YAO Jing1,2,3   

  1. 1.School of Mechanical Engineering,Yanshan University, Qinhuangdao,Hebei,066004
    2.Key Laboratory of Advanced Forging & Stamping Technology and Science,Ministry of Education,Yanshan University,Qinhuangdao,Hebei,066004
    3.Hebei Province Key Laboratory of Heavy Machinery Fluid Power Transmission and Control,Yanshan University,Qinhuangdao,Hebei,066004
  • Online:2017-10-25 Published:2017-10-24
  • Supported by:
    National Natural Science Foundation of China (No. 51575471)

多级压力源液压切换的位置伺服控制系统

曹晓明1;郭宝峰1,2;王佩1;李瑶1;姚静1,2,3   

  1. 1.燕山大学机械工程学院,秦皇岛,066004
    2.燕山大学先进锻压成形技术与科学教育部重点实验室,秦皇岛,066004
    3.燕山大学河北省重型机械流体动力传输与控制实验室,秦皇岛,066004
  • 基金资助:
    国家自然科学基金资助项目(51575471) ;
    河北省在读研究生创新能力培养资助项目(CXZZBS2017039);
    河北省高等学校科学技术研究项目(ZD2017077)
    National Natural Science Foundation of China (No. 51575471)

Abstract: For conventional valve-controlled servo control system in huge throttling loss, a multi-level pressure hydraulic switching system presented a possible solution to this challenge. Firstly, composition, working principles, definitions of multi-stage output forces and realization of energy-saving mechanism of this new hydraulic system were given, and the mathematical model were established. Secondly, taking a three-level pressure power supply for a displacement control system as example, a hybrid switching control strategy was designed. Finally, an experimental rig was established, and the control and energy saving characteristics of multi-level pressure hydraulic switching system were validated. The results prove that displacement and velocity jitter are existed during pressure switching, it has a significant energy saving effectiveness compared to the conventional hydraulic displacement control systems with the similar useful working energy.

Key words: hydraulic system, switching, displacement control, energy saving

摘要: 针对传统液压阀控系统传动效率低的问题,提出了一种新型液压回路——多级压力源液压切换系统,给出了该新型液压系统的组成、工作原理、多级输出力的定义以及节能机理的实现,并进行了机理建模;以3个压力等级为例,设计了混合控制策略;搭建了多级压力源液压切换系统原理验证实验台。实验结果表明,多级压力源液压切换系统在位移跟随过程中,压力切换时存在位移和速度抖动;与传统液压位置控制系统相比,该液压系统具有显著的节能效果。

关键词: 液压系统, 切换, 位置控制, 节能

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