Quenching of Self-Excited Vibrations

1989 ◽  
Vol 111 (2) ◽  
pp. 130-133 ◽  
Author(s):  
K. R. Asfar
Keyword(s):  
Control System ◽  
Vibration Control ◽  
Van Der Pol Oscillator ◽  
Van Der Pol ◽  
Passive Vibration Control ◽  
First Order ◽  
System A ◽  
Excited System ◽  
Excited Vibration ◽  
First Order Perturbation

A passive vibration control system for the quenching of undesirable self-excited vibrations in mechanical systems is presented. The system is a Lanchester damper, attached to the main self-excited system; a van der Pol oscillator. A first-order perturbation solution shows that complete quenching of self-excited vibration is possible. The result is verified by numerical integration of the governing differential equations. Furthermore, the damper is shown to be effective in suppressing forced self-excited vibrations.

Design of Suspension Vibration Control System Based on ON-OFF Algorithm

2012 ◽  
Vol 482-484 ◽  
pp. 1213-1217
Author(s):  
Jie Yue ◽  
Jin Qiu Zhang ◽  
Yong Qiang Gao ◽  
Zhi Zhao Peng ◽  
Zhi Tao Shi
Keyword(s):  
Control System ◽  
Vibration Control ◽  
Suspension System ◽  
Signal Design ◽  
Single Chip ◽  
Control Effect ◽  
Damping Force ◽  
System A ◽  
Vehicle Suspension System ◽  
Control Accuracy

Aimed to satisfy damping force change requirement of vehicle MRF suspension vibration control system, a controller of MRF suspension system based on On-Off control algorithm is designed, and a control system is carried out. The system takes single chip AT90CAN128 which obey the CAN bus protocols as micro-controller, and it accomplish AD conversion of sensor signal, design of On-Off algorithm and output of PWM voltage power control signal. The system also is used in vibration control experiment of tracklayer vehicle suspension system. The experiment shows that the controller can improve control accuracy, and the control effect is obviously.

scholarly journals Self- excited oscillation under the influence of non - linear frictions

1982 ◽  
Vol 4 (3) ◽  
pp. 7-10
Author(s):  
Nguyen Van Dao
Keyword(s):  
Equilibrium Position ◽  
The Self ◽  
Van Der Pol Oscillator ◽  
Van Der Pol ◽  
Excited System ◽  
Non Linear ◽  
Excited Oscillation

In this article the influence of friction R1, R2 on Van der Pol oscillator is considered. It turned out that the mentioned frictions decrease the amplitude of self – excited oscillations and they stabilize the equilibrium position of the self – excited system.

OPTIMIZATION OF PASSIVE VIBRATION CONTROL SYSTEM APPLIED IN STRUCTURAL MODEL INCORPORATING SMA-SE COIL SPRINGS ASSOCIATED WITH TMD

2019 ◽  
Author(s):  
Carlos Heitor de Andrade Lustosa ◽  
Yuri Moraes ◽  
Antonio Almeida Silva ◽  
MARCELO CAVALCANTI RODRIGUES ◽  
Armando Wilmans Nunes da Fonseca Júnior ◽  
...  
Keyword(s):  
Control System ◽  
Vibration Control ◽  
Structural Model ◽  
Passive Vibration Control

Suppression of Limit Cycle Oscillations in a Van der Pol Oscillator by Means of a Passive Nonlinear Energy Sink

2005 ◽  
Author(s):  
Young S. Lee ◽  
Alexander F. Vakakis ◽  
Lawrence A. Bergman ◽  
D. Michael McFarland
Keyword(s):  
Vibration Control ◽  
Limit Cycle ◽  
Nonlinear Energy Sink ◽  
Van Der Pol Oscillator ◽  
Numerical Continuation ◽  
Parameter Study ◽  
Limit Cycle Oscillations ◽  
Van Der Pol ◽  
Energy Sink ◽  
Nonlinear Energy

We present a study of passive but efficient vibration control, wherein a so-called nonlinear energy sink (NES) completely eliminates the limit cycle oscillations (LCOs) of a van der Pol oscillator. We first perform a parameter study in order to get overall understanding of responses with respect to parameters. Then, we establish a slow flow dynamics model to perform analytical study of the suppression mechanism which corresponds to classical nonlinear energy pumping, i.e., passive, broadband, and targeted energy transfer through 1:1 resonance capture. Utilizing the method of numerical continuation of equilibrium, we also study the bifurcation of the steady state solutions. It turns out that the system may have either subcritical or supercritical LCOs, and that for some parameter domain the LCOs are completely eliminated. This suggests applicability of the NES to vibration control in self-excited systems.

scholarly journals Semiactive Vibration Control Using a Magnetorheological Damper and a Magnetorheological Elastomer Based on the Bouc-Wen Model

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Wei Zhu ◽  
Xiao-ting Rui
Keyword(s):  
Control System ◽  
Vibration Control ◽  
Magnetorheological Damper ◽  
Hysteretic Behavior ◽  
Magnetorheological Elastomer ◽  
New Approach ◽  
System A ◽  
In Series ◽  
Reduction Effect

A vibration control system is put forward using a magnetorheological damper (MRD) and a magnetorheological elastomer (MRE) connected in series. In order to model the hysteresis of the MRD, a Bouc-Wen model and a corresponding parameter identification method are developed for the MRD. The experimental results validate the proposed Bouc-Wen model that can predict the hysteretic behavior of the MRD accurately. The role of the MRE is illustrated by an example of a single degree-of-freedom system. A semiactive vibration control strategy of the proposed vibration control system is proposed. To validate this new approach, experiments are conducted and the results highlight significantly improved vibration reduction effect of the proposed vibration control system than the vibration control system only using the MRD.

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