Affiliation:
1. Hebei Normal Universty
Abstract
The process of Argon-bottom-blowing is widely used in steelmaking, Argon is used to stir molten steel fully and uniform the composition and temperature to improve the quality of molten steel. In this paper, Argon-bottom-blowing supply system is selected as the research object, there exits big delay because of the long gas pipeline. In order to overcome the adverse effect of time-delay, the reasonable Smith predictor is designed, which try to make PID regulator act in advance and reduce system overshoot amount. The simulation results show Smith predictor and PID controller are connected in parallel, the influence of time-delay can be eliminated and satisfactory control effect can be obtained.
Publisher
Trans Tech Publications, Ltd.
Reference9 articles.
1. Shen J, Zhao Y, Han G. Design on Optimization of Argon Bottom Blowing of Molten Steel ladle [J]. Procedia Engineering, 2011, 16: 284-290.
2. Shi R G, Wang Z Y, Yang S G, et al. Refining Molten Steel with Argon Blowing by Metal Nozzle Mold Bottom[J]. Applied Mechanics and Materials, 2014, 496: 357-361.
3. Li Z, Dai Wei C C, Xinjun J, et al. A Study on Water Model for 120 t Ladle Bottom Argon Blowing Process [J][J]. Special Steel, 2012, 4: 004.
4. Sierociuk D, Macias M. Comparison of variable fractional order PID controller for different types of variable order derivatives[C]/Carpathian Control Conference (ICCC), 2013 14th International. IEEE, 2013: 334-339.
5. Padula F, Visioli A. Tuning rules for optimal PID and fractional-order PID controllers [J]. Journal of Process Control, 2011, 21(1): 69-81.