Robust fractional-order temperature control of a steel slab reheating furnace with large time delay uncertainty

2014 ◽  
Author(s):  
Vicente Feliu-Batlle ◽  
Raul Rivas-Perez ◽  
Fernando J. Castillo-Garcia
Keyword(s):  
Time Delay ◽  
Fractional Order ◽  
Temperature Control ◽  
Large Time ◽  
Reheating Furnace ◽  
Steel Slab

Smith predictor based fractional-order integral controller for robust temperature control in a steel slab reheating furnace

2019 ◽  
Vol 41 (16) ◽  
pp. 4521-4534 ◽  
Author(s):  
Vicente Feliu-Batlle ◽  
Raul Rivas-Perez
Keyword(s):  
Time Delay ◽  
Fractional Order ◽  
Temperature Control ◽  
Pid Controller ◽  
Large Time ◽  
Smith Predictor ◽  
Reheating Furnace ◽  
Steel Slab ◽  
Integral Controller ◽  
Fractional Order Integral

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.

Robust Fractional Order Proportional Integral Control for Large Time-Delay System

2014 ◽  
Vol 716-717 ◽  
pp. 1614-1619
Author(s):  
Rui Hao Xin ◽  
Chun Yang Wang ◽  
Xue Lian Liu ◽  
Ming Qiu Li ◽  
Duan Yuan Bai
Keyword(s):  
Time Delay ◽  
Fractional Order ◽  
Delay Time ◽  
Large Time ◽  
Delay System ◽  
Order System ◽  
Time Delay System ◽  
Proportional Integral ◽  
Integral Controller ◽  
Proportional Integral Controller

In this paper, a new control method for large time delay system is proposed. Firstly, the decreasing time delay controller is used to remodel large delay time plant into small delay time plant. Then, a fractional robust proportional-integral controller (FOPI) is designed, using the phase margin and cut-off frequency at a specified point in the Bode plot of flat robust conditions, to guarantee the desired control performance and the robustness of the high order system to the gain order system. For comparison between the fractional order proportional integral controller and the traditional integer order PID (IOPID) controller, the IOPID controller is also designed following the same proposed tuning specifications. The simulation results indicates that the both designed controllers work efficiently. Furthermore, the FOPI controller makes the large time-delay system get better control effect, the system has high robustness, adaptive ability and anti-jamming ability.

Fuzzy Gain Scheduled Smith Predictor for Temperature Control in an Industrial Steel Slab Reheating Furnace

2016 ◽  
Vol 14 (11) ◽  
pp. 4439-4447 ◽  
Author(s):  
I.O. Benitez ◽  
R. Rivas ◽  
V. Feliu ◽  
L.P. Sanchez ◽  
L.A. Sanchez
Keyword(s):  
Temperature Control ◽  
Smith Predictor ◽  
Reheating Furnace ◽  
Steel Slab ◽  
Gain Scheduled

Application Study on Distributed Predictive Control of Beer Fermentation Temperature

2014 ◽  
Vol 513-517 ◽  
pp. 4525-4528
Author(s):  
Shang Ji Liang ◽  
Wang Chan Chan
Keyword(s):  
Time Delay ◽  
Predictive Control ◽  
Temperature Control ◽  
Control Algorithm ◽  
Large Time ◽  
Control Model ◽  
Distributed Parameter ◽  
Application Study ◽  
Beer Fermentation ◽  
Fermentation Temperature

As the temperature process of beer fermentation has a large time delay, strong coupling and distributed parameter, the process requirements are difficult to satisfy for conventional control. The beer fermentation temperature control model was developed and the Smith compensation and distributed predictive control algorithm were proposed. The simulation shows that the algorithm can satisfy the technological requirements very well.

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

2021 ◽  
Author(s):  
L. Aguero Carhuavilca ◽  
E. Navarro Castro ◽  
A. Llanos Rodriguez ◽  
D. Barrera Esparta
Keyword(s):  
Temperature Control ◽  
Smith Predictor ◽  
Reheating Furnace ◽  
Steel Slab

scholarly journals Adaptive Predefined-Time Synchronization of Two Different Fractional-Order Chaotic Systems With Time-Delay

IEEE Access ◽  
2021 ◽  
Vol 9 ◽  
pp. 31908-31920
Author(s):  
Lixiong Lin ◽  
Qing Wang ◽  
Bingwei He ◽  
Yanjie Chen ◽  
Xiafu Peng ◽  
...  
Keyword(s):  
Time Delay ◽  
Fractional Order ◽  
Chaotic Systems ◽  
Time Synchronization
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