纸机干燥部通汽系统耦合问题的动态建模研究

Dynamic Modelling Research on Coupling of Drying System of Paper Machine

针对纸机干燥部供汽通道间复杂关联作用造成的烘缸蒸汽压力稳态性差的问题,利用数学建模法精确地描述这种关联关系,并在动态解耦的基础上采用前馈-反馈的控制策略,实现多路通汽系统的压力控制。该系统在生产过程中表现出良好的控制效果,表明本文建立的数学模型精确,分析过程合理,解耦及控制方法有效。

Aiming at the low stability of vapour pressures of dryer cylinders caused by complicated associate relationship between supplying channels of drying system, this associate relationship is described accurately by mathematic modeling. Based on dynamic deeoupling, pressure control of muhichannel vapour supply is realized by using feedforward and feedback control strategy. The better running effect of control system indicates the modeling is accurate, the process analysis is reasonable, and the control strategy is effective.