Title :
Control schemes for a cyclically operating aluminum extruder plant
Author :
Pandit, M. ; Buchheit, K.
Author_Institution :
Kaiserslautern Univ., Germany
Abstract :
Productivity and product quality of aluminium manufactured by extrusion are enhanced by control of the exit temperature of the extruded bars. Problems encountered. In the design of a suitable control system and control schemes tried hitherto are described. A new control scheme which improves the control from cycle to cycle by iteratively optimizing a quality index is presented. It is shown how an advantage offered by iterative control, viz. the feasibility of non-causal filtering, can be exploited to avoid time-lags inherent in smoothing algorithms. A comparison of the performance of the presented control schemes and results obtained in field-tests are presented
Keywords :
extrusion; learning systems; metallurgical industries; process control; smoothing methods; temperature control; cyclically operating aluminum extruder plant; exit temperature control; iterative control; non-causal filtering; product quality; productivity; quality index; smoothing algorithms; Gradient methods; Learning control systems; Metals industry; Process control; Smoothing methods; Temperature control;
Conference_Titel :
Control Applications, 1994., Proceedings of the Third IEEE Conference on
Conference_Location :
Glasgow
Print_ISBN :
0-7803-1872-2
DOI :
10.1109/CCA.1994.381427
