基于模糊自调整PID的全液压矫直机位置控制研究  

Research on position control of full-hydraulic leveler based on fuzzy self-adjustment PID

作　　者：曹益忠 袁豪 哈达 张卫荣 冯金刚 CAO Yizhong;YUAN Hao;HA Da;ZHANG Weirong;FENG Jingang(College of Mechanical Engineering,Taiyuan University of Technology,Taiyuan 030024,China;Engineering Research Center of Advanced Metal Composites Forming Technology and Equipment of Ministry of Education,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]太原理工大学机械工程学院,山西太原030024 [2]太原理工大学先进金属复合材料成形技术与装备教育部工程研究中心,山西太原030024

出　　处：《轧钢》2025年第1期107-112,共6页Steel Rolling

基　　金：国家重点研发计划资助项目(2018YFA0707300);金属成形技术与重型装备全国重点实验室开放课题项目(B2408100.W17)。

摘　　要：全液压矫直机是消除钢板浪形缺陷和残余应力、保证平直度的重要精整设备,直接影响着板材的表面质量。传统矫直机主要通过常规PID控制液压缸的位置精度来实现辊缝的在线动态调整,但受来料不均、参数摄动以及伺服阀死区等因素影响使液压系统具有非线性和参数时变等特点,因此针对传统PID控制很难满足现代矫直工艺要求的问题,提出了一种基于模糊自调整PID的矫直机液压位置控制策略,将模糊逻辑控制和常规PID控制结合,构成模糊自调整PID控制方法应用于矫直机的液压AGC系统。通过仿真和实验表明,该控制方法比常规的PID控制方法更加实用,在现场十三辊全液压高强板矫直机上可实现实际辊缝值与目标辊缝值的最大偏差控制在0.13mm以内,平均偏差控制在0.06mm以内,4个液压缸压力的最大偏差在1.00MPa以内,平均偏差控制在0.12MPa以内,对其他电液伺服系统的升级改造具有一定的指导意义。Full-hydraulic leveler is an important finishing equipment to eliminate wave defects and residual stress and ensure the flatness of the plate,which directly affects the surface quality of the plate.The traditional full-hydraulic leveler mainly realizes on-line dynamic adjustment of roll gap by controlling the position accuracy of hydraulic cylinder with conventional PID.The hydraulic system has the characteristics of nonlinear and time-varying parameters due to the influence of uneven incoming materials,parameter perturbation and servo valve dead zone.Therefore,aiming at the problem that traditional PID control is difficult to meet the requirements of modern straightening process,a hydraulic position control strategy based on fuzzy self-adjusting PID is proposed,which combine the fuzzy logic control and the conventional PID,applied to the hydraulic AGC system of the leveler.Simulation and experiment show that the control method is more practical than the conventional PID control method.The maximum deviation between the actual roll gap value and the target roll gap value can be controlled within 0.13mm,the average deviation is controlled within 0.06mm.The maximum deviation of the pressure of four hydraulic cylinders is within 1.00MPa,and the average deviation is controlled within 0.12MPa on the field 13-high full hydraulic high-strength plate leveler.It has certain guiding significance for the upgrade of other electro-hydraulic servo systems.

关 键 词：矫直机 液压系统 PID控制 模糊自调整PID 位置控制 

分 类 号：TG333.23[金属学及工艺—金属压力加工]