基于模型参考自适应Smith预估器的反馈式AGC厚度 - 控制理论与应用.PDF

26 9 Vol. 26 No. 9 2009 9 Control Theory Applications Sept. 2009 :2009 SmithAGC , , , (1. , 410083; 2. (), 401326) : AGC(automatic gauge control), Smith , Smith AGC , . , , ., Smith AGC , AGC , , , . : ; Smith; AGC; : TP273.6 : A Feedback automatic gauge control system using model reference adaptive Smith predictor LI-Xun , SONG Dong-qiu , YU Shou-yi , GUI Wei-hua (1. School of Information Science and Engineering, Central South University, Changsha Hunan 410083, China; 2. Southwest Aluminum (Group) Co, Ltd, Chongqing Sichuan 401326, China) Abstract: Based on the compensating principle of Smith predictor for the time-delay process, we build a model- reference-adaptive(MRA) Smith-predictor feedback control model for the automatic-gauge-control(AGC) system. The structure of the control system is determined, the design algorithm and the adaptive modulation principle are derived. Combining the MRA Smith-predictor feedback with the AGC control model, we can control the thickness-deviation at the output. Simulation results show that the AGC system with the MRA Smith-predictor feedback exhibits an excellent perfor- mance in controlling the thickness deviation of rolled aluminum strips. The limitation on the time-delay which originally affects the control performance is now eliminated, the thickness-variation at the output is removed, and the response rate is raised. In summary the product specifications of aluminum strips are satisfied. Key words: rolling