第
15
卷第
10
期
2011
年
10
月
电机与控制学报
ELECTRIC
MACHINES
AND
CONTROL
,
Vo
l. 15
No.
10
Oc
t. 2011
轧机液压伺服位
系统的自适应反步滑模控制
方一鸣
1
,
2
,
焦宗夏
1 ,
王文宾
2
,
邵彭真
2
(1.北京航空航天大学自动化学院,北京
1
∞
191;
2.
燕山大学工业计算?证制工程河北省重点实验室,河北秦皇岛
066
∞
4)
摘
要:针对轧机液压伺服位直系统存在非线性特性、参数不确定性以及控制输入前具有不确定系
数的问题,提出了一种自适应反步滑模拉制方法。通过对系统非线性模型的等价变换和选择合适
的
Lyapunov
函数,有效解决了由于控制输入前具有不确定系数导致的所设计的控制量与自适应律
王相嵌套的难题。把自适应反步法和滑模控制方法相结合,有效克服了系统非线性与参数不确定
性的影响,提高了系统的鲁棒性。在自适应反步滑模拉制器设计时,给出了不确定参数的自适应
a
律,并对系统跟踪误差的收敛性进行了证明。仿真研究结果表明,所设计的自适应反步滑模控制器
能实现快速准确的跟踪,并且对多数变化具有较强的鲁棒,性,与
PID
控制器相比,系统跟踪误差,卜,
响应速度快,跟踪性能好。
关键词:自适应反步控制;轧机液压伺服系统;滑模控制;不确定系教;非线性系统
中图分类号
:TP273
文献标志码
:A
文章编号:
1007-
449X(
2011 )
10-
0095-
06
Adaptive backstepping sliding mode control for roIIing
miII hydraulic servo position system
FANG
Yi_mingl
,2 ,
JIAO
Zong-xia
1
,
WANG
Wen-bin
2
,
SHAO
Peng-zhen
2
(1.
College
of
Automation
,
Beihang
University
,
Beijing
100191 , China;
2.
Key
La
boratorγof
Industrial
Computer
Control
Engineering
of
Hebei
Province
,
Yanshan
University
,
Qinhuangdao
066004
, China)
Abstract
: An adaptive backstepping sliding mode control method is proposed for rolling mill hydraulic
servo position system
, which contains nonlinear characteristics, parametric uncertainty
and
the control in-
put
with uncertain coefficient. By using the equivalent transformation of the nonlinear model
and
selecting
a proper Lyapunov function
, the nesting problem caused
by
the mutual inclusion of parameter adaptive
law
and
control
input
was effectively solved. By combining
the
adaptivebackstepping
and
the sliding
mode method
, it
can
effectively overcome the influence causecl by
the
nonlinear characteristics
and
para-
,metric uncertainty
and
improve the robustness of the system.
In
the adaptive backstepping sliding mode
controller design
, adaptive law of the uncertain parameters was given
and
the convergence of the system
tracking error was also proved. Simulation results show that the designed controller
can
achieve fast
and
accurate tracking,
and
has
stronger robustness for
the
parameter variations. Compared with
the
PID con-
troller
, it
has
small system tracking error, fast response
and
good tracking performance.
Key
words:
adaptive backstepping control; hydraulic servo system of rolling
mill;
sliding mode control;
uncertain coefficient; nonlinear system
收稿日期
:2011-05-07
基金项曰:国家自然科学基金
(61074099)
作者简介:方一鸣(
1965
一)
,男,博士后,教授,研究方向为自适应鲁棒控制理论与应用、冶金自动化等;
焦宗夏(
1963
一)
,男,博士,教授,博士生导师,研究方向为新型作动系统、电液负载模拟器等机电系统设计等;
王文宾(
1985-)
,男,硕士研究生,研究方向为冷连轧机液压伺服厚度控制、自适应控制与应用;
邵彭真(
1987
一)
,男,硕士研究生,研究方向为轧机液压伺服系统切换控制、鲁棒控制理论与应用。