Torsional Vibration Suppression Control in the Main Drive System of Rolling Mill by State Feedback Speed Controller Based on Extended State Observer

2007 ◽  
Author(s):  
Ruicheng Zhang ◽  
Zhikun Chen ◽  
Youliang Yang ◽  
Chaonan Tong
Keyword(s):  
Torsional Vibration ◽  
Rolling Mill ◽  
State Feedback ◽  
Vibration Suppression ◽  
State Observer ◽  
Drive System ◽  
Extended State Observer ◽  
Extended State ◽  
Speed Controller ◽  
Main Drive System

scholarly journals Experimental Verifications of Vibration Suppression for a Smart Cantilever Beam with a Modified Velocity Feedback Controller

2014 ◽  
Vol 2014 ◽  
pp. 1-9
Author(s):  
Ting Zhang ◽  
Hong Guang Li ◽  
Guo Ping Cai ◽  
Fu Cai Li
Keyword(s):  
Free Vibration ◽  
State Feedback ◽  
Vibration Suppression ◽  
State Observer ◽  
Feedback Controller ◽  
Extended State Observer ◽  
Feedback Gain ◽  
Flexible Beam ◽  
Extended State ◽  
Velocity Feedback

This paper presents various experimental verifications for the theoretical analysis results of vibration suppression to a smart flexible beam bonded with a piezoelectric actuator by a velocity feedback controller and an extended state observer (ESO). During the state feedback control (SFC) design process for the smart flexible beam with the pole placement theory, in the state feedback gain matrix, the velocity feedback gain is much more than the displacement feedback gain. For the difference between the velocity feedback gain and the displacement feedback gain, a modified velocity feedback controller is applied based on a dynamical model with the Hamilton principle to the smart beam. In addition, the feedback velocity is attained with the extended state observer and the displacement is acquired by the foil gauge on the root of the smart flexible beam. The control voltage is calculated by the designed velocity feedback gain multiplied by the feedback velocity. Through some experiment verifications for simulation results, it is indicated that the suppressed amplitude of free vibration is up to 62.13% while the attenuated magnitude of its velocity is up to 61.31%. Therefore, it is demonstrated that the modified velocity feedback control with the extended state observer is feasible to reduce free vibration.

scholarly journals Active vibration suppression for rolling mills vibration based on extended state observer and parameter identification

2019 ◽  
Vol 39 (2) ◽  
pp. 435-450 ◽  
Author(s):  
Xinxin Wang ◽  
Xiaoqiang Yan
Keyword(s):  
Rolling Mill ◽  
Vibration Suppression ◽  
Control Method ◽  
Work Roll ◽  
State Observer ◽  
Extended State Observer ◽  
Thin Strip ◽  
Extended State ◽  
Rolling Mills ◽  
Equivalent Mass

Rolling mills vibration is a key factor that hinders the production of thin-strip steel. Currently, vibration is mainly suppressed by adjusting rolling mill parameters which is not a common approach. Due to special working conditions, the information of work roll, such as displacement and velocity, cannot be directly measured. Therefore, based on extended state observer, new resonance ratio control method, which is a common approach, is proposed to suppress the rolling mill vibration. First, the equivalent mass of the back roll is identified. Then, the interaction force between the work roll and the back roll and the velocity of the back roll are estimated using the extended state observer. Finally, these values are introduced into the input of the servo valve to compensate. The simulation results indicate that vibrations of both the work roll and the back roll are suppressed, and this method has a great tolerance for the identification error of the back-roll equivalent mass, and extended state observer compensation possesses a more superior vibration suppression than disturbance observer compensation.

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