串级预测控制及其在涤纶片基生产线中的应用(英文)

Cascade Generalized Predictive Control Applied to Biaxial Film Production Process

中文关键词  预测控制  串级控制系统  计算机控制

英文关键词  generalized predictive control(GPC)  cascade control system  computer control

中文摘要

      涤纶片基拉膜生产线是一个大滞后的复杂工业生产过程, 包含纵拉伸区和横拉伸区, 生产中的扰动经常发生在铸片过程中. 本文为此提出一种针对该类生产过程的预测控制算法, 与典型的PI控制器相比, 可以有效地克服内环的扰动, 外环的预测控制器可以充分利用系统信息给出内环的设计值.

英文摘要

      Biaxial film production is a complex industrial process with large time_delay, it includes two stretch processes: longitudinally and laterally, the disturbances often occur in the film_forming part. We propose in this paper a cascade generalized predictive control(CGPC) real_time algorithm developed for this control system. The use of CGPC algorithm instead of classical PI cascade controller is now very well applied to industrial practice due to the quick rejection of the effect of disturbances in the inner loop, the master loop takes into account more information about the future using GPC algorithm to give the setpoint of the inner loop.