Active Disturbance Rejection Control for Hydraulic Position Control System of High-Quality Cold Rolling Mill

2012 ◽  
Vol 572 ◽  
pp. 114-119
Author(s):  
Xiao Fei Xiang ◽  
Zhe Wang ◽  
Fei Zhang ◽  
Li Zhao
Keyword(s):  
Control System ◽  
Cold Rolling ◽  
Disturbance Rejection ◽  
Rolling Mill ◽  
Position Control ◽  
Tracking System ◽  
Cold Rolling Mill ◽  
Stability Margins ◽  
Active Disturbance Rejection ◽  
Position Control System

Active disturbance rejection controller (ADRC) instead of the conventional PID controller in the hydraulic position control system is proposed to satisfy high accuracy and speed requirements in cold rolling mill. Based on the simplified model, frequency-domain analysis of the two kinds of controllers is performed. The results show that ADRC produces better performances, such as bandwidth, stability margins. Because of the extended state observer (ESO) that can estimate and compensate the tracking system in real time, ADRC reduces the dependence on accurate mathematical model, improves anti-disturbance capability of the system, and maintains good dynamic characteristics. The simulation results verified the effect of the conclusion.

Research of Smith Monitor AGC Based on Active Disturbance Rejection Control

2012 ◽  
Vol 572 ◽  
pp. 49-54
Author(s):  
Fei Zhang ◽  
Li Feng Ye ◽  
Wen Quan Sun ◽  
Xiao Huai Ren
Keyword(s):  
Cold Rolling ◽  
Disturbance Rejection ◽  
Rolling Mill ◽  
Large Time ◽  
Simulation Analysis ◽  
Smith Predictor ◽  
Active Disturbance Rejection Control ◽  
Cold Rolling Mill ◽  
Active Disturbance Rejection ◽  
Disturbance Rejection Control

In response to the characteristics of large time delay, nonlinear, various disturbances in Monitor AGC system for cold rolling mill, a control strategy combining Smith predictor with Active Disturbance Rejection Control (ADRC) is proposed. Approximation ability of Extended State Observer (ESO) to estimate unknown parts of controlled plant model is promoted by model compensated ADRC. Aimed at a 4-high cold rolling mill, simulation analysis for classical Smith predictor monitor AGC and ADRC-Smith predictor Monitor AGC is used. The results indicate that ADRC-Smith predictor Monitor AGC has better performance on robustness and capacity of anti-disturbance.

Computer Control System Development for the New Type Pilot Cold Rolling Mill

2012 ◽  
Vol 472-475 ◽  
pp. 3043-3046
Author(s):  
Zhi Jie Jiao ◽  
Chun Yu He ◽  
Jian Ming Sun ◽  
Ying Zhang
Keyword(s):  
Control System ◽  
Cold Rolling ◽  
Rolling Mill ◽  
Position Control ◽  
Computer Control ◽  
Research Work ◽  
Automation System ◽  
Computer Control System ◽  
Cold Rolling Mill ◽  
New Type

According to the requirement to the pilot mill for the cold rolling process research work, new type pilot reverse cold rolling mill is designed. Computer control system, including primary automation system, process automation system and human machine interface (HMI) system, is developed for this mill. Technological control function such as electric position control, hydraulic tension control, automatic gauge control (AGC), and process control functions such as model setup calculation, process tracking, actual data treatment are realized. This new type pilot cold rolling mill has been used successfully in several iron steel companies.

Developing an effective diagnosis for safety improvement in steelworks

2005 ◽  
Vol 4 (4) ◽  
pp. 229-240
Author(s):  
A.R. Hale ◽  
H.A. v.d. Waterbeemd ◽  
R. Potter ◽  
B.H. Heming ◽  
P.H.J.J. Swuste ◽  
...  
Keyword(s):  
Control System ◽  
Cold Rolling ◽  
Rolling Mill ◽  
Safety Management ◽  
Risk Control ◽  
Cold Rolling Mill ◽  
Rich Picture ◽  
Safety Improvement ◽  
Effective Diagnosis ◽  
Current Risk

The paper describes the methods used for a study of the safety management system and culture of a cold rolling mill in a steel plant. It uses data from diverse sources which can be validated against each other and combined to produce a rich picture of the current risk control system and its shortcomings. The paper also describes the proposed improvements and what the plant chose to implement. This step also throws light on the culture of the plant.

Advanced thickness gauge control system for cold rolling mill in an unsteady state

1993 ◽  
Vol 90 (1) ◽  
pp. 99-106
Author(s):  
K. Kikuchi ◽  
Y. Naitoh ◽  
S. Yamamoto ◽  
A. Kitamura ◽  
Y. Nishida ◽  
...  
Keyword(s):  
Control System ◽  
Cold Rolling ◽  
Rolling Mill ◽  
Thickness Gauge ◽  
Unsteady State ◽  
Cold Rolling Mill

The Transformation of Control System for Bell-Type Annealing Furnace with Pure Hydrogen in Pangang Group Cold Rolling Mill

2013 ◽  
Vol 336-338 ◽  
pp. 1245-1249
Author(s):  
Jian Bing Wu ◽  
Ji Guang Liu
Keyword(s):  
Control System ◽  
Cold Rolling ◽  
Production Process ◽  
Rolling Mill ◽  
Pure Hydrogen ◽  
Security Measures ◽  
Annealing Furnace ◽  
Cold Rolling Mill ◽  
Hydrogen Flow ◽  
Control Functions

The transformed control system of bell-type annealing furnace with pure hydrogen in Pangang Group cold rolling mill is analyzed, and the technological process, the structure of control system, the control principle are introduced. The principles and implementations of important control functions are analyzed in detail, including security measures, the measurement and control of hydrogen flow, temperature control etc. The production practice shows that, the transformed control system stabilizes the production process, improves product quality, optimizes the production process.

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