中国机械工程 ›› 2021, Vol. 32 ›› Issue (12): 1432-1442.DOI: 10.3969/j.issn.1004-132X.2021.12.006

• 机械基础工程 • 上一篇    下一篇

基于死区补偿的电液位置伺服系统自抗扰控制

王立新1;赵丁选1;刘福才2;刘谦1;张祝新1   

  1. 1.燕山大学机械工程学院,秦皇岛,066004
    2.燕山大学工业计算机控制工程河北省重点实验室,秦皇岛,066004
  • 出版日期:2021-06-25 发布日期:2021-07-08
  • 通讯作者: 赵丁选(通信作者),男,1965年生,教授、博士研究生导师。研究方向为复杂机械系统动力学建模及仿真、汽车主动悬挂技术等。发表论文200余篇。E-mail:zdx@ysu.edu.cn。
  • 作者简介:王立新,男,1988年生,博士研究生。研究方向为自抗扰控制技术、液压伺服控制技术。发表论文8篇。E-mail:wlx@stumail.ysu.edu.cn。
  • 基金资助:
    国家重点研发计划(2016YFC0802902);
    河北省自然科学基金创新研究群体项目(E2020203174);
    河北省重点研发计划(20353501D)

ADRC for Electro-hydraulic Position Servo Systems Based on Dead-zone Compensation#br#

WANG Lixin1;ZHAO Dingxuan1;LIU Fucai2;LIU Qian1;ZHANG Zhuxin1   

  1. 1.School of Mechanical Engineering,Yanshan University,Qinhuangdao,Hebei,066004
    2.Hebei Province Key Lab of Industrial Computer Control,Yanshan University,Qinhuangdao,Hebei,066004
  • Online:2021-06-25 Published:2021-07-08

摘要: 针对电液位置伺服控制系统的比例阀死区、参数不确定及外部未知扰动等问题,设计了由自抗扰控制器与死区逆补偿构成的串联控制器。首先基于实验辨识构造死区逆模型对死区进行预补偿,然后根据系统特性设计了一阶自抗扰控制器,构造改进的扩张状态观测器对“总扰动”进行实时估计,并通过非线性控制律给予主动补偿。联合仿真与试验结果表明,所提出的串联控制器有效地补偿了比例阀死区,提高了系统动态性能和位置跟踪精度。

关键词: 液压系统, 死区, 自抗扰控制, 扩张状态观测器

Abstract: Aiming for the problems of proportional valve dead-zone, parametric uncertainties, and unknown external disturbances in electro-hydraulic position servo control systems, a cascade controller which was composed of ADRC and dead-zone inverse compensation was designed. Firstly, the valve dead-zone was pre-compensated by an inverse model which was established based on experimental identification. Then, according to the characteristics of the system, the first-order ADRC was designed. “general disturbances” were estimated by an improved ESO and compensated by a nonlinear control law in real-time. The results of co-simulation and experiments show that the proposed cascade controller effectively compensates the proportional valve dead-zone, improves dynamic performances and position tracking accuracy of the system.

Key words: hydraulic system, dead-zone, active disturbance rejection control(ADRC), extended state observer(ESO)

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