Advanced Flatness Control Strategies for Multivariable Optimisation Flatness Control System of Foil Rolling Mill

2013 ◽  
Vol 655-657 ◽  
pp. 1450-1455 ◽  
Author(s):  
Liang Hao ◽  
H.S. Di ◽  
D.Y. Gong ◽  
D.B. Wei ◽  
Z.Y. Jiang
Keyword(s):  
Control System ◽  
Control Systems ◽  
Rolling Mill ◽  
Rolling Force ◽  
Control Strategies ◽  
Bending Force ◽  
Foil Rolling ◽  
Flatness Control ◽  
Application Fields ◽  
Flatness Error

In cold strip or foil rolling, flatness control is an integral part of modern mill. This paper introduces two typical flatness control systems, pattern recognisation flatness control system and multivariable flatness control. It is found that the latter is effective and has wider application fields. The FEM models of its core parameters, flatness actuator efficiency, are constructed. Influencing factors, such as the rolling force, bending force as well as the tilting force are discussed. Control strategies are proposed for foil rolling. The results demonstrate that the control strategies can reduce flatness error and improve flatness quality.

A Flatness Control System Design Based on Actuator Efficiency Factors for Cold Rolling Mill

2010 ◽  
Vol 139-141 ◽  
pp. 1889-1893 ◽  
Author(s):  
Peng Fei Wang ◽  
Dian Hua Zhang ◽  
Xu Li ◽  
Jia Wei Liu
Keyword(s):  
Control System ◽  
Rolling Force ◽  
Quantitative Description ◽  
Learning Model ◽  
Feed Forward Control ◽  
Flatness Control ◽  
Stand Type ◽  
Loop Feedback ◽  
Efficiency Factors ◽  
Self Learning

In order to improve the flatness of cold rolled strips, strategies of closed loop feedback flatness control and rolling force feed forward control were established respectively, based on actuator efficiency factors. As the basis of flatness control system, efficiencies of flatness actuators provide a quantitative description to the law of flatness control. For the purpose of obtaining accurate efficiency factors matrixes of actuators, a self-learning model of actuator efficiency factors was established. The precision of actuator efficiency factors could be improved continuously by correlative measurement flatness data inputs. Meanwhile, the self-learning model of actuator efficiency factors permits the application of this flatness control for all possible types of actuators and every stand type. The developed flatness control system has been applied to a 1250mm single stand 6-H reversible UCM cold mill. Applications show that the flatness control system based on actuator efficiency factors is capable to obtain good flatness.

Simulation study of tram priorities effectiveness implemented in traffic control system

2018 ◽  
Vol 122 ◽  
pp. 5-15
Author(s):  
Mirosław Czerliński ◽  
Rafał Ruść ◽  
Józef Suda
Keyword(s):  
Control System ◽  
Control Systems ◽  
Simulation Study ◽  
Future Study ◽  
Traffic Control ◽  
Detection System ◽  
Control Strategies ◽  
Simulation Approach ◽  
Simulation Environment ◽  
Traffic Control System

One of the elements of implemented in Poland traffic control systems is module of priorities for public transport. Essence of working priority and the basic indicators of its effectiveness were presented. Among methods for testing the effectiveness of the priority, there has been distinguished economic and simulation approach. An example of priority research based on simulation of chosen street in Bydgoszcz was shown, using Vissim simulation environment. Developed simulation model, its connection to the control system, adopted detection system and 4 tested control strategies were also described. Then, the simulation and its results were presented. In results discussion they were compared in terms of adopted control strategies. In summary, possibility of a future study extension was also indicated.

scholarly journals HEADING CONTROL OF AUTOMATED GUIDED VEHICLES

2021 ◽  
Vol 6 (3) ◽  
Author(s):  
Abhishek Bhardwaj ◽  
Kshitij Anand ◽  
Murtaza Khasamwala
Keyword(s):  
Fuzzy Logic ◽  
Control System ◽  
Control Systems ◽  
Pid Control ◽  
Control Strategies ◽  
Optimal Path ◽  
Automated Guided Vehicles ◽  
Holistic View ◽  
Heading Control ◽  
Automation Control

With rapid developments in industry wide automation control systems, there have been numerous proposed design and control strategies as alternatives to conventional methods. This term paper deals with the same in the context of Automated Guided Vehicles (AGV’s) with a review of the current literature for proposed design improvements as well as trajectory control systems that can improve productivity and reduce conflicts compared to current methods. The results of these proposed methods are also compared in contrast to each other to obtain holistic view of the merits and demerits of the same. It is found that a fuzzy logic based PID control is a definite upgrade over conventional PID control systems and that the application of LIDAR and Camera based technologies can help enable free roaming AGV’s lending to increased robustness and flexibility. For a control system consisting of a single AGV and multiple processing stations, a genetic algorithm enhanced centralized fuzzy logic control system is the most optimal path planning algorithm whereas in the cases of multiple robots, a dynamic priority allocated free roaming AGVsystem with semi-decentralized control is found to be much more efficient at simultaneously solving paths and reducingconflicts with other robots in real time compared to the purely centralized systems.

scholarly journals Modernization of laboratory rolling mill 150 for the formation of students 'studies of automation object research

2021 ◽  
Vol 3 (134) ◽  
pp. 87-98
Author(s):  
Mykhailo Zinchenko ◽  
Oleh Potap ◽  
Maria Rybalchenko ◽  
Ivan Manachyn
Keyword(s):  
Control Systems ◽  
Rolling Mill ◽  
Rolling Force ◽  
Frequency Converter ◽  
Rolling Process ◽  
Gear Ratio ◽  
Educational Process ◽  
Displacement Sensor ◽  
Sensors And Actuators ◽  
Monitor Screen

Studying the operation of automated control systems using computers significantly re-duces the time, but does not give a complete picture of the system on a real object. Therefore, the use of real objects for the study of control systems in the educational process is appropriate and useful. The purpose of the study is to modernize the laboratory rolling mill 150, designed for rolling lead, tin and plasticine, and equip it with sensors and actuators. The manual pressure device of the rolling stand was replaced by an automated one, for which an worm gearbox was additionally installed, which allowed to increase the total gear ratio to 94.5. The thrust screws are moved from the AC motor, which is controlled by the DOP-103BQ operator panel and the MS-300 frequency converter with built-in PLC. As a displacement sensor used photopulse sensor PDF-3. The installed equipment and the developed software for the operator panel and the PLC provided high accuracy of in-stallation of pressure screws in the set position. Additionally, software was developed to measure the power parameters of the rolling process: the rolling force and the electrical parameters of the DC motor of the drive of the rolling stand. The software allows you to configure the board, ie select the type of board, the channels used to measure voltage signals, select measurement ranges, signal color on the graph, signal polling frequency, number of points to display on the graph, parameters of graph coordinate axes. In the process of measurement, the output of signals to the monitor screen is performed simultaneously. Before rolling, the measurement process is started using the keyboard or mouse and the change of parameters is displayed on the screen in real time. At the end of the rolling process, the measurement stops, and the graphs of parameter changes over time remain on the monitor screen, which allows you to quickly analyze the process. The measurement results can be saved in an Excel file and then the file can be viewed. The file stores: the time of measurement of parameters and the values of parameters those were measured. Measurement of power parameters and sizes of rolled products before and after rolling allowed to determine the stiffness of the stand and rolled metal, which is necessary to calculate the transmission coefficients of the automated tuning system of the rolling stand.

scholarly journals Development of an Automatic Elastic Torque Control System Based on a Two-Mass Electric Drive Coordinate Observer

Machines ◽  
2021 ◽  
Vol 9 (12) ◽  
pp. 305
Author(s):  
Andrey A. Radionov ◽  
Alexandr S. Karandaev ◽  
Vadim R. Gasiyarov ◽  
Boris M. Loginov ◽  
Ekaterina A. Gartlib
Keyword(s):  
Control System ◽  
Literature Review ◽  
Control Systems ◽  
Electric Drive ◽  
Rolling Mill ◽  
A Priori ◽  
Torque Control ◽  
Mass System ◽  
Loop Control ◽  
Plate Rolling

Development of control system based on digital twins of physical processes is a promising area of research in the rolling industry. Closed-loop control systems are developed to control the coordinates of two-mass electromechanical systems in order to limit the dynamic loads on the equipment of main rolling lines. These control systems are based on observers (digital shadows) that indirectly detect (reconstruct) the roll speed and the elastic torque of the shaft (spindle) in real time. Notably, observers are required to work fast in order to reconstruct transients attributable to shock (impact) loads. Literature review shows that the known observers, which use complex algorithms to compute coordinates, do not respond fast enough. The paper analyzes the kinematic diagram of Mill 5000, a plate rolling mill. It presents oscillograms that prove that the elastic torque does oscillate as the rolls grip the strip dynamically. The authors hereof have developed an observer that reconstructs the coordinates of the uncontrolled mass (the shaft) and the spindle torque from the parameters of the controlled mass, namely the torque and speed of the motor. The paper further rationalizes an approach that consists of simulating the processes on a model to further directly configure them on the object. The authors analyze the transients of the reconstructed two-mass system coordinates, which are associated with the rolls gripping the strip. The paper compares data against oscillograms recorded on the mill itself. The accuracy is satisfactory. The proposed observer has been used to developed a three-loop automatic speed control system for the uncontrolled mass. Controller configurations are substantiated. The paper shows coordinates obtained by simulation modeling as functions of time. It further presents experiments run on Mill 5000; the conclusions are that the amplitude and oscillations of the elastic torque drop significantly. The paper concludes with recommendations on industrial adoption of the observer and the novel electric drive coordinate control system. Study presented herein substantiates and implements a concept of developing algorithms that solve specific problems and are readily implementable on the existing equipment without need for additional computing devices. The contribution of the paper consists of stating and solving the problem of developing and testing an automatic elastic torque control system for the shaft of a heavy-duty rolling mill. This system has been implemented in the form of algorithms that run in the software of the existing industrial controllers (PLCs). It is simple and performs well. It does not need additional sensors or computers to be implemented, nor does it rely on complex computational algorithms. Such algorithms are based on computational tables that require a priori data on numerous process parameters. In our literature review, we have not come across any industrial implementation of such algorithms on hot-rolling mills.

Remote Simulation to Evaluate Real-Time Traffic Control Strategies

2000 ◽  
Vol 1727 (1) ◽  
pp. 95-100 ◽  
Author(s):  
David E. Lucas ◽  
Pitu B. Mirchandani ◽  
K. Larry Head
Keyword(s):  
Adaptive Control ◽  
Control System ◽  
Control Systems ◽  
Real Time ◽  
Traffic Control ◽  
Control Strategies ◽  
Remote Access ◽  
Hardware In The Loop ◽  
Simulation Environment ◽  
Real Time Traffic

Simulation is a valuable tool for evaluating the effects of various changes in a transportation system. This is especially true in the case of real-time traffic-adaptive control systems, which must undergo extensive testing in a laboratory setting before being implemented in a field environment. Various types of simulation environments are available, from software-only to hardware-in-the-loop simulations, each of which has a role to play in the implementation of a traffic control system. The RHODES (real-time hierarchical optimized distributed effective system) real-time traffic-adaptive control system was followed as it progressed from a laboratory project toward actual field implementation. The traditional software-only simulation environment and extensions to a hardware-in-the-loop simulation are presented in describing the migration of RHODES onto the traffic controller hardware itself. In addition, a new enhancement to the standard software-only simulation that allows remote access is described. The enhancement removes the requirement that both the simulation and the traffic control scheme reside locally. This architecture is capable of supporting any traffic simulation package that satisfies specific input-output data requirements. This remote simulation environment was tested with several different types of networks and was found to perform in the same manner as its local counterpart. Remote simulation has all of the advantages of its local counterpart, such as control and flexibility, with the added benefit of distribution. This remote environment could be used in many different ways and by different groups or individuals, including state or local transportation agencies interested in performing their own evaluations of alternative traffic control systems.

Design of a Semi-Real Simulation Platform for the Cold Rolling Mill

2013 ◽  
Vol 395-396 ◽  
pp. 1243-1247
Author(s):  
Gang Zheng ◽  
Bin Ma ◽  
Zhe Yang ◽  
Ding Liu
Keyword(s):  
Control System ◽  
Cold Rolling ◽  
Rolling Mill ◽  
Rolling Force ◽  
Milling Process ◽  
Simulation System ◽  
Simulation Platform ◽  
Cold Rolling Mill ◽  
Online Data ◽  
Simulation Results

We designed a semi-real simulation platform for the cold rolling mill that was composed of Simulation Computer, Simulation System of Field Signal, AGC Control System, Console of Rolling Mill and the Main Control Computer, and built the mathematical models in the Simulation Comuter, for the hydraulic servo system, rolling force and thickness of strip material. In the platform, the Simulation System of Field Signal output the simulation data as standard sensor signal; the AGC Control System is the same as that used in real rolling mill system. We simulated the milling process of real rolling mill system at this platform using the field-recorded online data. The differences between simulation results and those in real system were small. Simulation results show that this simulation platform can be used in the research and optimization of rolling mill control system.

Web-Based Heating Boiler Control System Research

2012 ◽  
Vol 198-199 ◽  
pp. 1774-1778
Author(s):  
Dong Song Luo ◽  
Ji Ying Tuo
Keyword(s):  
Control System ◽  
Human Resources ◽  
Control Systems ◽  
Mixed Mode ◽  
Control Strategies ◽  
Operating Costs ◽  
System Research ◽  
Web Based ◽  
And Control ◽  
Heating Boiler

Aiming at the defects of traditional heating boiler control systems, in Geographical limitations, waste of human resources etc. We combines Web technology with traditional heating boiler control strategies, developed a B/S,C/S mixed-mode control system, that allows workers look up data and control heating boilers from Website safely, no matter where the heating boiler located. Website is developed in ASP.NET, other programs are developed in VC++.NET. This system can improve management and production efficiencies, reduce human resources and operating costs.

scholarly journals MODELING OF A SYSTEM FOR AUTOMATIC REGULATION OF THE TENSION MODE IN THE ROUGHING GROUP OF STANDS OF A CONTINUOUS SECTION MIL

2021 ◽  
pp. 67-73
Author(s):  
Ivan Marynych ◽  
Olga Serdiuk
Keyword(s):  
Control System ◽  
Automatic Control ◽  
Control Systems ◽  
Automatic Control System ◽  
Rolling Mill ◽  
Rolling Speed ◽  
Automatic Regulation ◽  
Automatic Control Systems ◽  
Rolling Mode ◽  
Uneven Heating

The subject of the research is automatic control system modeling features for tensioning of stands roughing group, which takes into account changes in the rolling speed at exit of the previous stand and entrance to the next stand. Control systems for high-speed rolling on section mills are the most critical systems, since the trouble-free operation of rolling mill largely depends on their work. Rolling speed control is understood to mean tension regulation in the roughing group of stands and stabilization of the rolling loop in the finishing groups. The influence of such technological factors as uneven heating of blanks, change in the crimping mode in stands, etc. leads to the appearance of tension or back-up forces, deviation of rolled loop from the specified values. Tension rolling, in contrast to loop rolling, is a stable rolling mode. However, (at significant values of tension in the rolled products) such a rolling mode leads to different thicknesses of the finished product. The loop rolling mode is an unstable mode and is impossible without automatic control systems. Both in the tension rolling mode and in the free rolling mode with a loop, it is necessary to study automatic control systems in order to determine the possibilities of compensating for disturbing influences and obtaining rolled products of the given accuracy. Therefore, the main task of the automatic control system is to maintain the rolling mode with the lowest possible tension. To achieve this goal, direct control of the tension of the rolled strip with modern technical means is rather difficult, and the operation of tension control systems is based on indirect methods of measuring it, and the study of the system efficiency is reduced to modeling the process itself. The developed model consists of three stands and two inter-stand spaces, since it takes into account changes in rolling speed at the exit of previous stand and the entrance to the next stand. It is due to this that adequate simulation results are obtained that are close to the real rolling process. Keywords: automation, rolls, stand, inter-stand spacing, modeling, loop tension, rolling mill, roughing group.

Sign in / Sign up

Export Citation Format

Share Document