摘要
针对轧机液压伺服系统的非线性模型进行了研究,考虑板材的坑洼问题、黏滞摩擦力、系统参数不确定等非线性特性,设计了一种滑模变结构控制器,并分析了滑模中参数K的取值范围,以保证系统的稳定性。仿真实验结果表明:所设计的滑模变结构控制器可有效克服轧机液压系统的摩擦非线性以及板材坑洼等问题,对系统参数的不确定性有较好的鲁棒性,其响应速度、稳态误差、抗干扰特性均优于模糊PID控制。
Considering the problem that the surface of the steel plate is not smooth and nonlinear characteristicssuch as the viscous friction and the uncertainty of system parameters so on, thenonlinear model of hydraulic servo system of the rolling mill was researched and the sliding modevariable structure controller was designed and the value range of the parameter K in the sliding modeto ensure the stability of the system was analyzed. According to the results of the simulation, thesliding mode variable structure controller designed could effectively overcome the nonlinear friction ofthe system and solve such problem as potholes on steel plate and so on, and has better robustness tothe uncertainty of system parameters. By the contrast simulation with the fuzzy PID control, theresponse speed, steady state error and anti-interference performance are all better.
出处
《重庆理工大学学报（自然科学）》
CAS
2017年第4期111-114,共4页
Journal of Chongqing University of Technology：Natural Science
基金
2015年重庆市本科高校"三特行动计划"特色专业建设项目(渝教高[2015]69号)
关键词
非线性
滑模变结构
轧机
nonlinear
sliding mode variable structure
rolling mill
