Active Disturbance Rejection Control for Electro-hydraulic Proportional Servo Force Loading

被引：0

作者：

Wang L. ^{[1
]}

Zhao D. ^{[1
]}

Liu F. ^{[2
]}

Meng F. ^{[1
]}

Liu Q. ^{[1
]}

机构：

[1] School of Mechanical Engineering, Yanshan University, Qinhuangdao

[2] Key Laboratory of Industrial Computer Control Engineering of Hebei Province, Yanshan University, Qinhuangdao

来源：

Jixie Gongcheng Xuebao/Journal of Mechanical Engineering | 2020年 / 56卷 / 18期

关键词：

Active disturbance rejection control; Dead-zone inverse compensation; Electro-hydraulic proportional loading system; Force control;

D O I：

10.3901/JME.2020.18.216

中图分类号：

学科分类号：

摘要：

To solve the problem of rough force control precision in electro-hydraulic proportional loading system, a cascade controller consisting of a dead-zone inverse compensation and a linear active disturbance rejection controller(LADRC) is proposed. Various disadvantages in the force control system are taken into account, including the non-linearity of the proportional valve dead-zone, hydraulic parameter perturbation, unknown external disturbances and so on. Based on the analysis of the mechanism of the electro-hydraulic proportional force loading system model, a second-order LADRC is designed, according to the relative order of the system. The "generalized disturbances" are estimated by a linear extended state observer (LESO) and compensated by a linear state error feedback control law(LSEF). In addition, the dead-zone inverse model is constructed to deal with the system output lag problem caused by the proportional valve dead-zone. The extensive comparative experiments show that the proposed approach improves the dynamic and static characteristics of the electro-hydraulic proportional loading system, achieves higher accuracy of force control, and possesses strong robustness and anti-interference, provides reference for engineering application. © 2020 Journal of Mechanical Engineering.

引用

页码：216 / 225

页数：9