连续平压机热压板升降系统控制算法  

Design and Application of a Control Algorithm for Hydraulic Lifting System of the Hot Platen in Continuous Flat Press

作　　者：苗虎[1] 周玉成[1,2] 盛振湘 侯晓鹏[1,2] 张国梁[1] 安源[1,2] 

机构地区：[1]中国林业科学研究院木材工业研究所,北京100091 [2]国家林业局木材科学与技术重点实验室,北京100091 [3]中国福马机械集团有限公司,北京100029

出　　处：《农业机械学报》2014年第7期333-339,共7页Transactions of the Chinese Society for Agricultural Machinery

基　　金：科研院所技术开发研究专项资金项目(2013EG135240);中央级公益性科研院所基本科研业务费专项资金资助项目(CAFINT2009K07)

摘　　要：针对人造板连续平压机的热压板整体升降过程中多组液压油缸同步运动控制问题,提出一种斜率式渐次逼近算法,能够根据各液压油缸的实际位置状态,动态地确定主、从系统,按照一定的斜率分步逐次逼近目标值,从而使各升降系统在任意时刻的位置误差都在理想的范围内,达到同步升降的目的。对该算法进行Matlab仿真,并将其应用到国产第一条连续平压机生产线上。生产实践表明,该算法能够实现连续平压机的同步上升与下降,同时很好地解决各液压油缸在运动过程中的相互影响,使其相互之间的位置差值较小,上升、下降过程的同步误差分别为0.5 mm、0.6 mm,液压元器件产生的冲击较小,过程平稳,控制精度能够达到工艺要求。The hot platen needs to be lifted and descended integrally, and to be kept in horizontal level during the process which was realized by position synchronization control of multiple group hydraulic cylinders. It is a difficult point in control of continuous fiat press. In order to solve this problem, a ramp type successive-approximation algorithm was proposed. The algorithm can dynamically select one group of hydraulic cylinder as ＂virtual main system＂, and the other groups as ＂ slave system＂ according to the actual displacement of the hydraulic cylinders in any control cycle. Then the virtual main system can gradually approach the target value step-by-step with a certain ramp. At the same time the slave system tracks the virtual main system in real time, so that it can be realized that the multiple group hydraulic cylinders move synchronously during the lifting and descending process. The algorithm was simulated in Matlab. Then the algorithm was applied to the continuous fiat press production line designed by China Foma （Group）Co. , Ltd. Production practice indicates that the algorithm can solve the interaction and influence between the multiple group hydraulic cylinders in movement effectively. The synchronous error of the lifting and descending process is 0.5 mm and 0.6 mm respectively. The shock of hydraulic components is less, the process is smooth and the control precision can meet technological requirements.

关 键 词：人造板 连续平压机 热压板 液压升降系统 控制算法 

分 类 号：TS64[轻工技术与工程] TB114.2[理学—运筹学与控制论]