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.

Missile longitudinal autopilot design using a generalized extended state observer-based mixed H2/H∞ control method

2019 ◽  
Vol 233 (13) ◽  
pp. 4704-4720 ◽  
Author(s):  
Yi Dong ◽  
Jian Li ◽  
Tong Li ◽  
Jie Wu
Keyword(s):  
State Feedback ◽  
State Observer ◽  
The State ◽  
Feedback Controller ◽  
Extended State Observer ◽  
Linear Matrix ◽  
Extended State ◽  
State Feedback Controller ◽  
Input Disturbance ◽  
Equivalent Input Disturbance

This work presents a novel robust control design approach for missile longitudinal autopilot under multiple disturbances and uncertainties. The uncertainties and disturbances of the missile dynamics are treated as a lumped disturbance based on the concept of equivalent input disturbance. Then a generalized extended state observer is employed to estimate the system states and the equivalent input disturbance in an integrated manner. These estimates are used to construct the state-feedback controller as well as to attenuate the effect of the exogenous disturbances and endogenous uncertainties. The state-feedback controller is obtained by solving the linear matrix inequalities of mixed [Formula: see text]/[Formula: see text] control problem, which provides an impressive flexibility to tune the controller to compromise between [Formula: see text] performance and [Formula: see text] performance. Closed-loop stability of the system under the presented controller-observer structure is also established. The proposed design tactfully circumvents the engineering implementation problems encountered by mixed [Formula: see text]/[Formula: see text] control, achieves strong robustness against disturbances and uncertainties, and does not involve any complicated nonlinear control methodologies. Numerical simulation results of nominal and perturbed performance comparisons with classic methods sufficiently demonstrate the feasibility and robustness of the proposed method.

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.

scholarly journals Vibration Control of a Semiactive Vehicle Suspension System Based on Extended State Observer Techniques

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Ze Zhang ◽  
Hamid Reza Karimi ◽  
Hai Huang ◽  
Kjell G. Robbersmyr
Keyword(s):  
Vibration Suppression ◽  
Control Method ◽  
Mr Damper ◽  
State Observer ◽  
Extended State Observer ◽  
Extended State ◽  
Active Disturbance Rejection ◽  
Disturbance Rejection Control ◽  
Feedback Control Method ◽  
Vehicle Suspension System

A feedback control method based on an extended state observer (ESO) method is implemented to vibration reduction in a typical semiactive suspension (SAS) system using a magnetorheological (MR) damper as actuator. By considering the dynamic equations of the SAS system and the MR damper model, an active disturbance rejection control (ADRC) is designed based on the ESO. Numerical simulation and real-time experiments are carried out with similar vibration disturbances. Both the simulation and experimental results illustrate the effectiveness of the proposed controller in vibration suppression for a SAS system.

Vibration Suppression Control Method using Extended State Observer for Angular Transmission Error in Cycloid Gear

2014 ◽  
Vol 134 (3) ◽  
pp. 241-251 ◽  
Author(s):  
Shouta Kawahara ◽  
Takashi Yoshioka ◽  
Kiyoshi Ohishi ◽  
Nguyen Hien ◽  
Toshimasa Miyazaki ◽  
...  
Keyword(s):  
Vibration Suppression ◽  
Control Method ◽  
Transmission Error ◽  
State Observer ◽  
Extended State Observer ◽  
Extended State

scholarly journals Fault-tolerant control for a class of n-order systems based on fast terminal sliding mode and extended state observer

2021 ◽  
pp. 002029402110286
Author(s):  
Pu Yang ◽  
Peng Liu ◽  
ChenWan Wen ◽  
Huilin Geng
Keyword(s):  
Fault Tolerant ◽  
Sliding Mode ◽  
Singular Control ◽  
Fault Tolerant Control ◽  
State Observer ◽  
Extended State Observer ◽  
Extended State ◽  
Terminal Sliding Mode ◽  
Fast Terminal Sliding Mode ◽  
Terminal Sliding Surface

This paper focuses on fast terminal sliding mode fault-tolerant control for a class of n-order nonlinear systems. Firstly, when the actuator fault occurs, the extended state observer (ESO) is used to estimate the lumped uncertainty and its derivative of the system, so that the fault boundary is not needed to know. The convergence of ESO is proved theoretically. Secondly, a new type of fast terminal sliding surface is designed to achieve global fast convergence, non-singular control law and chattering reduction, and the Lyapunov stability criterion is used to prove that the system states converge to the origin of the sliding mode surface in finite time, which ensures the stability of the closed-loop system. Finally, the effectiveness and superiority of the proposed algorithm are verified by two simulation experiments of different order systems.

Sign in / Sign up

Export Citation Format

Share Document