Cavity Pressure Control by Iterative Learning Control with Zero-phase Filtering in Injection Molding
Cavity pressure featured by cycle is a crucial process variable to determine the product quality in injection molding. A feedforward and feedback control method based on iterative learning control (ILC) with zero-phase filtering is proposed. ILC is used as feedforward part to realize accurate trajectory tracking with information of previous cycle and proportional control is used as feedback part to reject disturbances present at current cycle. In order to overcome bad learning transients in ILC, the convergence condition in frequency domain is derived and the implementation method of monotonic decay of learning transients is presented. The experimental results show that the proposed method makes ILC with monotonic decay of learning transients and the accurate tracking of cavity pressure setting curve achieved.
Cavity Pressure Iterative Learning Control Zero-phase Filtering Feedforward and Feedback Control
Chuang Li Fuli Wang Dapeng Niu Yang Liu
School of Information Science and Engineering, Northeastern University, Shenyang, 110004 School of Information Science and Engineering, Northeastern University, Shenyang, 110004 Key Laborat
国际会议
The 22nd China Control and Decision Conference(2010年中国控制与决策会议)
徐州
英文
376-379
2010-05-26（万方平台首次上网日期，不代表论文的发表时间）