多级压力源液压切换的位置伺服控制系统  

Multi-level Pressure Switching Displacement Servo Control Systems

作　　者：曹晓明[1] 郭宝峰[1,2] 王佩[1] 李瑶 姚静[1,2,3] 

机构地区：[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

出　　处：《中国机械工程》2017年第20期2447-2454,共8页China Mechanical Engineering

基　　金：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)

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。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？ com-position, 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 vali-dated. The results prove that displacement and velocity jitter are existed during phas a significant energy saving effectiveness compared to the conventional hydraulic displacement con-trol systems with the similar useful working energy.

关 键 词：液压系统 切换 位置控制 节能 

分 类 号：TH137.7[机械工程—机械制造及自动化]