Hopf bifurcation control of nonlinear electromechanical coupling main drive system of rolling mill

2020 ◽  
Vol 135 (4) ◽  
Author(s):  
Shuang Liu ◽  
Hongling Ai ◽  
Zhenfang Pang ◽  
Zhenjun Lin ◽  
Dingxuan Zhao
Keyword(s):  
Hopf Bifurcation ◽  
Rolling Mill ◽  
Electromechanical Coupling ◽  
Drive System ◽  
Bifurcation Control ◽  
Main Drive System

Research on Main Drive System Vibration of Six-Roller Wide Strip Aluminum Cold Rolling Mill

2014 ◽  
Vol 644-650 ◽  
pp. 259-264
Author(s):  
Da Zhi Zhang ◽  
Ling Qi Meng
Keyword(s):  
Cold Rolling ◽  
Rolling Mill ◽  
Electromechanical Coupling ◽  
Harmonic Component ◽  
Oscillation Period ◽  
Drive System ◽  
Response Analysis ◽  
Cold Rolling Mill ◽  
Finite Element Software ◽  
Main Drive System

Vibration appears in the main drive system of the six-roller cold rolling mill of one plant. The oscillation frequency is 2.5 Hz. The oscillation cycle is 0.4 second. The oscillation period has nothing to do with the speed. Using the finite element software ANSYS, the low natural frequency is got through the modal analysis and harmonic response analysis based on the measured vibration data from the field. Horizontal vibration is the main vibration mode and it is the electromechanical coupling vibration. Main motor is controlled by IEGT inverter of TEMIC and the low frequency harmonic component is difficult to eliminate. AC drive trap filter is designed to dodge the 2.5 Hz frequency. The solution has achieved the recognition by the TEMIC company. The problem was solved and good results were obtained.

Electromechanical Coupling Vibration of Rolling Mill Excited by Variable Frequency Harmonic

2014 ◽  
Vol 912-914 ◽  
pp. 662-665 ◽  
Author(s):  
Yi Fang Zhang ◽  
Xiao Qiang Yan ◽  
Qi Hui Ling
Keyword(s):  
Torsional Vibration ◽  
Rolling Mill ◽  
Electromechanical Coupling ◽  
Drive System ◽  
Current Signal ◽  
Output Current ◽  
Coupling Vibration ◽  
Current Harmonics ◽  
Electric Drive System ◽  
Frequency Harmonic

Using torque telemetry system to test the mechanical drive system of rolling mill,it is found that the torsional vibration and current signal in the electric drive system have the same obviously vibration frequency. The model of cycloconverter, synchronous motor and mechanical drive system of rolling mill are built and analysed by Matlab/Simulink and ANSYS.The simulation results show when the harmonic torque frequency and the torsional vibration natural frequency of for mechanical drive system are equal or close, the strong torsional vibration arouse It is proved that the convertor output current harmonics can induce the electromechanical coupling vibration of main mechanical drive system under the certain conditions.

Research on Chaotic and Control of the Rolling Mill Main Drive System

2013 ◽  
Vol 321-324 ◽  
pp. 1675-1678
Author(s):  
Xiao Ying Li ◽  
Rui Cheng Zhang ◽  
Tao Shi ◽  
Jia Cheng
Keyword(s):  
Theoretical Analysis ◽  
Rolling Mill ◽  
Mechanical Energy ◽  
Steel Production ◽  
Drive System ◽  
Vibration System ◽  
Non Linear ◽  
Non Linear System ◽  
And Control ◽  
Main Drive System

Rolling mill as a class of key iron and steel industry metallurgical equipment, responsible for the national production of heavy plate strip, its productivity and product quality of course become the focus of attention. In a large rolling mill equipment, rolling mill drive system as the interface with the electrical system, electrical energy into mechanical energy, and rolled steel production process to meet the torque and speed required for high precision and high dynamic control performance. In this paper, plate and strip rolling mill of the early nonlinear dynamic system as the research object, through theoretical analysis, numerical simulation and experimental study, done the following work.For the beginning of the process of rolling mill main drive system of the nonlinear characteristics of chaotic motion, through the theoretical analysis has proved that the original vibration system to become passive equivalent non-linear systems, the use of passive non-linear system characteristics, a class of moving boundary mechanical vibration system to exert control over the chaotic behavior, simulation experiments show that the control strategy is not only achieved rapid control of the system, and control is simple, easy to achieve.

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