基于WGC方法设计的PI控制器在吹塑机中的应用  

Application of PI Controller Based on WGC Method in Blow Molding Machine

作　　者：张彬[1] 林红先[2] 蔡萃[1] ZHANG Bin;LIN Hong-xian;CAI Cui(Shaanxi Vocational and Technical College,Xi'an 710038,China;Xi’an Petroleum University,Xi'an 710065,China)

机构地区：[1]陕西职业技术学院,陕西西安710038 [2]西安石油大学,陕西西安710065

出　　处：《塑料科技》2020年第8期119-122,共4页Plastics Science and Technology

摘　　要：在塑料薄膜制造过程中,吹塑机薄膜厚度控制系统的性能对薄膜成品质量起着决定性作用。针对吹塑机厚度控制问题,基于时间延迟一阶积分系统模型,提出采用WGC方法设计的PI控制算法。采用稳定边界轨迹方法计算稳定域;经优化分析,确定经加权后的WGC点的最优方案。仿真模拟结果表明,所提出的方法在塑料薄膜厚度控制中表现出良好的伺服性能以及平缓的控制器输出。In the process of plastic film manufacturing,the performance of film thickness control system plays a decisive role in film quality.Aiming at the problem of thickness control of blow molding machine,a PI control algorithm based on WGC is proposed based on the first-order integrating system model of time delay.The stable boundary trajectory method is used to calculate the stable domain.Through optimization analysis,the optimal scheme of weighted WGC points is determined.The simulation results show that the proposed method has good servo performance and anti-disturbance performance in the plastic film thickness control.

关 键 词：PI控制器 稳定边界轨迹法 吹塑机 厚度控制 

分 类 号：TQ320.6[化学工程—合成树脂塑料工业]