Active Vibration Control Methods of Axially Moving Materials - A Review

2004 ◽  
Vol 10 (4) ◽  
pp. 475-491 ◽  
Author(s):  
Jianjun Wang ◽  
Qihan Li
Keyword(s):  
Transfer Function ◽  
Vibration Control ◽  
Active Control ◽  
Control Method ◽  
Active Vibration Control ◽  
Control Methods ◽  
The Past ◽  
Active Vibration ◽  
Axially Moving ◽  
Active Wave

In this paper we provide a review of the state of the art for active vibration control of axially moving materials (string and beam, etc.) in the past ten years, with particular regard to the subjects of some important active control methods of axially moving strings. First, an introduction is given to explain the aims and scope of this paper. This is followed by a comprehensive discussion of the active wave control methods presented by many investigators in the past ten years, including feedback control methods (such as the modal control method, the direct velocity feedback control method and the control method via transfer function formulation), active wave control methods combining transfer function, boundary control methods using the Lyapunov function, the variable structure control method, the adaptive control method, the vibration control of an axially moving beam and the active control of a moving material with arbitrarily varying length, etc. Finally, we conclude with a discussion of several issues for future research in this area.

Application of a Proportional Feedback Controller for Active Control of a Vibration Isolator

2005 ◽  
Vol 24 (3) ◽  
pp. 181-190 ◽  
Author(s):  
Yun-Hui Liu
Keyword(s):  
Vibration Control ◽  
Active Control ◽  
Control Method ◽  
Active Vibration Control ◽  
Feedback Signal ◽  
Total System ◽  
Vibration Isolator ◽  
Active Vibration ◽  
Proportional Controller ◽  
The Voice

This paper proposes the application of a proportional controller to active vibration control incorporated with a passive vibration isolator to suppress its resonant oscillation at its natural frequency. Vibration acceleration acquired from an accelerometer is fed to the controller as a feedback signal. The processed signal from the controller is transmitted to the voice coil actuator in order to control the vibration. Firstly, based on the theoretical equations which govern the vibrational system, the physical mechanism of active control in the total system is studied. Then, vibration on a stiff foundation and passive isolator is measured in order to understand the efficiency of the traditional vibration control method. Finally, an experiment on active vibration control is performed to study the suppression efficiency of the oscillation of the passive vibration isolator. The experiment results show that 99% of the vibration energy can be cancelled by active control.

Active Vibration Control for the Measurement of Fluidelastic Effects

2003 ◽  
Vol 125 (2) ◽  
pp. 165-170 ◽  
Author(s):  
Se´bastien Caillaud ◽  
Emmanuel de Langre ◽  
Franck Baj
Keyword(s):  
Vibration Control ◽  
Flow Velocity ◽  
Active Control ◽  
Control Method ◽  
Active Vibration Control ◽  
Two Phase ◽  
Single Input Single Output ◽  
Fluidelastic Instability ◽  
Active Vibration ◽  
Active Control Method

A new method based on active vibration control is proposed to investigate fluidelastic coupling effects beyond fluidelastic instability. This active control method allows to extend the range of flow velocity explored for single input-single output control systems. The method is applied on a flexible tube inserted in a rigid bundle in water and air-water cross-flows. This structure becomes unstable for high flow velocities, fluidelastic forces then causing the damping of the fluid-structure system to fall towards zero. The active control method allows to carry out tests beyond the fluidelastic instability. The flow velocity range explored is doubled in two-phase flow.

scholarly journals Piezoelectric Pushers for Active Vibration Control of Rotating Machinery

1989 ◽  
Vol 111 (3) ◽  
pp. 298-305 ◽  
Author(s):  
A. B. Palazzolo ◽  
R. R. Lin ◽  
R. M. Alexander ◽  
A. F. Kascak ◽  
J. Montague
Keyword(s):  
Feedback Control ◽  
Vibration Control ◽  
Active Control ◽  
Active Vibration Control ◽  
Rotating Machinery ◽  
Nasa Lewis Research ◽  
Control Methods ◽  
Test Rig ◽  
Related Theory ◽  
Active Vibration

The active control of rotordynamic vibrations and stability by magnetic bearings and electromagnetic shakers has been discussed extensively in the literature. These devices, though effective, are usually large in volume and add significant weight to the stator. The use of piezoelectric pushers may provide similar degrees of effectiveness in light, compact packages. This paper contains analyses which extend quadratic regulator and derivative feedback control methods to the “prescribed displacement” character of piezoelectric pushers. The structrual stiffness of the pusher is also included in the theory. Tests are currently being conducted at NASA Lewis Research Center with piezoelectric pusher-based active vibration control. The paper presents results performed on the NASA test rig as preliminary verification of the related theory.

Wave-based active vibration control of a membrane structure

2021 ◽  
pp. 107754632110429
Author(s):  
Xiang Liu ◽  
Liangliang Lv ◽  
Fujun Peng ◽  
Guoping Cai
Keyword(s):  
Vibration Control ◽  
Membrane Structure ◽  
Control Method ◽  
Active Vibration Control ◽  
Standing Waves ◽  
Vibration Modes ◽  
Control Laws ◽  
Reflected Waves ◽  
Active Vibration ◽  
Active Wave

Wave-based active vibration control of a membrane structure by using the Active Sink Method is studied in this paper. Unlike the modal-based vibration control method which attempts to suppress several vibration modes that have already been excited, wave-based active controller can keep vibration modes inactive by stopping the formation of standing waves in the structure. First, the wave transfer matrix is deduced to characterize the wave transmission in the membrane structure. Then, feedforward wave control laws are derived analytically to absorb reflected waves or eliminate transmitted waves. The validity of the proposed active wave controllers is verified through numerical simulations. Simulation results show that by using the active wave controllers no standing waves will be produced in the structure, and the vibration of the membrane structure is suppressed significantly.

Frequency Shaped Semi-Active Control for Magnetorheological Fluid-Based Vibration Control Systems

2013 ◽  
Author(s):  
Young-Tai Choi ◽  
Norman M. Wereley ◽  
Gregory J. Hiemenz
Keyword(s):  
Vibration Control ◽  
Control Systems ◽  
Active Control ◽  
Control Algorithm ◽  
Active Vibration Control ◽  
Control Algorithms ◽  
Model Parameters ◽  
Mr Fluid ◽  
Control Current ◽  
Active Vibration

Novel semi-active vibration controllers are developed in this study for magnetorheological (MR) fluid-based vibration control systems, including: (1) a band-pass frequency shaped semi-active control algorithm, (2) a narrow-band frequency shaped semi-active control algorithm. These semi-active vibration control algorithms designed without resorting to the implementation of an active vibration control algorithms upon which is superposed the energy dissipation constraint. These new Frequency Shaped Semi-active Control (FSSC) algorithms require neither an accurate damper (or actuator) model, nor system identification of damper model parameters for determining control current input. In the design procedure for the FSSC algorithms, the semi-active MR damper is not treated as an active force producing actuator, but rather is treated in the design process as a semi-active dissipative device. The control signal from the FSSC algorithms is a control current, and not a control force as is typically done for active controllers. In this study, two FSSC algorithms are formulated and performance of each is assessed via simulation. Performance of the FSSC vibration controllers is evaluated using a single-degree-of-freedom (DOF) MR fluid-based engine mount system. To better understand the control characteristics and advantages of the two FSSC algorithms, the vibration mitigation performance of a semi-active skyhook control algorithm, which is the classical semi-active controller used in base excitation problems, is compared to the two FSSC algorithms.

Comparison of Active and Hybrid Vibration Confinement With Conventional Active Vibration Control

1999 ◽  
Author(s):  
Lawrence R. Corr ◽  
William W. Clark
Keyword(s):  
Vibration Control ◽  
Control Method ◽  
Numerical Study ◽  
Active Vibration Control ◽  
Piezoelectric Actuators ◽  
Control Technique ◽  
Flexible Beam ◽  
Velocity Feedback ◽  
Active Vibration ◽  
Piezoelectric Actuators And Sensors

Abstract This paper presents a numerical study in which active and hybrid vibration confinement is compared with a conventional active vibration control method. Vibration confinement is a vibration control technique that is based on reshaping structural modes to produce “quiet areas” in a structure as opposed to adding damping as in conventional active or passive methods. In this paper, active and hybrid confinement is achieved in a flexible beam with two pairs of piezoelectric actuators and sensors and with two vibration absorbers. For comparison purposes, active damping is achieved also with two pairs of piezoelectric actuators and sensors using direct velocity feedback. The results show that both approaches are effective in controlling vibrations in the targeted area of the beam, with direct velocity feedback being slightly more cost effective in terms of required power. When combined with passive confinement, however, each method is improved with a significant reduction in required power.

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