第 33卷 第 9期 控 制 与 决 策 Vol.33 No.9
2018年 9月 Control and Decision Sep. 2018
文章编号: 1001-0920(2018)09-1649-08 DOI: 10.13195/j.kzyjc.2017.1001
基于非奇异快速终端滑模的轧机
液压伺服位置系统反步控制
李晓刚
1,3†
, 方一鸣
1,2
, 刘 乐
1
, 蔺明浩
1
(1. 燕山大学 工业计算机控制工程河北省重点实验室,河北 秦皇岛 066004;2. 国家冷轧板带装备及工艺
工程技术研究中心,河北 秦皇岛 066004;3. 河钢集团唐钢公司 信息自动化部,河北 唐山 063000)
摘 要: 针对具有非线性、参数不确定性和未知负载扰动的非对称缸轧机液压伺服位置系统, 提出一种基于模糊
自适应观测器和非奇异快速终端滑模面的反步控制方法. 首先, 基于非奇异快速终端滑模面和双幂次趋近律完成
非对称缸轧机液压伺服位置系统反步控制器的设计, 并通过构造二阶滑模滤波器对虚拟控制量的微分信号进行
估计, 有效地避免了反步控制中的微分爆炸现象; 然后, 选用模糊自适应观测器对系统的不确定项进行逼近估计,
并将输出的估计值引入到设计的控制器中进行补偿, 有效地提高了系统的跟踪控制精度, 且分析表明,所提出的控
制方法能够保证闭环系统全局渐近稳定; 最后, 基于某 650 mm 可逆冷带轧机液压伺服位置系统的实际参数进行
仿真研究, 并与常规线性滑模控制方法相比较, 结果验证了所提出方法能够有效提高系统在整个全局过程的收敛
速度和鲁棒稳定性.
关键词: 轧机液压伺服系统;非奇异快速终端滑模;双幂次趋近律;二阶滑模滤波器;模糊自适应观测器
中图分类号: TP273 文献标志码: A
Backstepping control of rolling mill hydraulic servo position system based
on nonsingular fast terminal sliding mode
LI Xiao-gang
1,3†
, FANG Yi-ming
1,2
, LIU Le
1
, LIN Ming-hao
1
(1. Key Lab of Industrial Computer Control Engineering of Hebei Province,Yanshan University,Qinhuangdao 066004,
China;2. National Engineering Research Center for Equipment and Technology of Cold Strip Rolling,Qinhuangdao
066004,China;3. Information and Automation Department, HBIS Group Tangsteel Company,Tangshan 063000,
China)
Abstract: Aiming at the hydraulic servo position system for asymmetric cylinder rolling mill with nonlinearity, parameter
uncertainty and unknown load, a compound control algorithm is designed based on the fuzzy adaptive observer and non
singular fast terminal sliding mode in this paper. Firstly, the a backstepping controller is designed based on the non
singular fast terminal sliding mode and double power reaching law, and second-order sliding mode filters are constructed
to estimate the differential signals of the virtual controls, which can avoid the differential explosion during using the
backstepping control effectively. Then, fuzzy adaptive observers are used to approximate the uncertain items in the
designed controllers, so as to improve the control precision of the system. Theoretical analysis shows that the closed-loop
system is globally asymptotically stable. Finally, simulation is carr ied out by using the actual data of the hydraulic
servo position system of a 650 mm reversing cold rolling mill, and the results show that the proposed control method
can enhance the asymptotic tracking performance and robust stability of the system in the whole global process through
comparing with the conventional sliding mode control method.
Keywords: hydraulic servo system of rolling mill;non singular fast terminal sliding mode;double power reaching law;
second-order sliding mode filters;fuzzy adaptive observer
收稿日期: 2017-07-26;修回日期: 2017-10-06.
基金项目: 河北省自然科学基金项目(F2016203263);河北省高等学校科学技术研究青年基金项目(QN2016122);燕
山大学博士基金项目(B960);燕山大学基础研究专项课题(青年课题)(16LGA005).
责任编委: 毛志忠.
作者简介: 李晓刚 (1975−), 男, 博士生, 从事冷带轧机轧制过程优化与协调控制的研究;方一鸣 (1965−), 男, 教授,
博士生导师, 从事连铸轧钢自动化技术与应用、复杂系统建模与控制等研究.
†
通讯作者. E-mail: xgang.li@163.com