A Comparison of GPC and Fuzzy Smith Predictor for Temperature Control of Steel Slab Reheating Furnace

Author(s):  
L. Aguero Carhuavilca ◽  
E. Navarro Castro ◽  
A. Llanos Rodriguez ◽  
D. Barrera Esparta
2019 ◽  
Vol 41 (16) ◽  
pp. 4521-4534 ◽  
Author(s):  
Vicente Feliu-Batlle ◽  
Raul Rivas-Perez

In this paper, a new strategy for robust control of temperature in a steel slab reheating furnace with large time delay uncertainty based on fractional-order controllers combined with a Smith predictor is proposed. A time delay model of the preheating zone of this process is used, obtained from an identification procedure applied in a real industrial furnace. It is shown that this process experiences very large time delay changes. A fractional-order integral controller embedded in a Smith predictor structure (FI-SP) is designed, which is robust to changes in such time delay. Simulated results of a standard Proportinal Integral Derivative (PID) controller, a PID controller embedded in a Smith predictor and the proposed FI-SP controller are compared. Six performance indexes have been used in this comparison. The analysis of these indexes shows that the designed FI-SP controller exhibits the most robust behavior (lowest indexes averaged in all the range of time delay variation) for ranges that include large time delays. Then the robustness features of the FI-SP controller outperform the other integer order controllers in the time responses both to set-point changes and to step disturbances. Therefore, this controller guarantees the best accuracy of temperature control. The designed FI-SP guarantees system stability and robust performance for a high range of plant time delay uncertainties.


2016 ◽  
Vol 14 (11) ◽  
pp. 4439-4447 ◽  
Author(s):  
I.O. Benitez ◽  
R. Rivas ◽  
V. Feliu ◽  
L.P. Sanchez ◽  
L.A. Sanchez

2014 ◽  
Vol 909 ◽  
pp. 317-322
Author(s):  
Huan Pao Huang ◽  
Ji An Yu ◽  
Qian Su ◽  
Lei Wang

2 × 660MW ultra-supercritical units of O'Brien Power Plant are single configuration of auxiliary pilot project, due to the higher its parameters and performance requirements, it need better control strategies to ensure safe and economical operation. Against traditional cascade PID main steam’s temperature control system delaying large, this article proposed control strategy based on Smith estimated. Main steam’s temperature controlled object inert zone mathematical model can be showed by multi-volume model, and use the improved system for large inertia Smith Predictor to make dynamic parameter control systems improvements. Simulation results of the simulation machine show that: Optimization emperor steam temperature control is in an adjustable range and the policy in separate auxiliary units is feasible.


2008 ◽  
Vol 48 (10) ◽  
pp. 1325-1330 ◽  
Author(s):  
Jung Hyun Jang ◽  
Dong Eun Lee ◽  
Chongmin Kim ◽  
Man Young Kim

ICCAS 2010 ◽  
2010 ◽  
Author(s):  
Pruetti Puawade ◽  
Vichitpon Boonpranchoo ◽  
Vittaya Tipsuwannaporn ◽  
Arjin Numsomran

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