Dynamic characteristics and modeling of a new magnetorheological damper for broadband vibration control

2007 ◽  
Author(s):  
Fengchen Tu ◽  
Zhaobo Chen ◽  
Hua Li ◽  
Yinghou Jiao ◽  
Bo Fang
Keyword(s):  
Vibration Control ◽  
Dynamic Characteristics ◽  
Magnetorheological Damper

scholarly journals Vibration Control of Buildings Using Magnetorheological Damper: A New Control Algorithm

2013 ◽  
Vol 2013 ◽  
pp. 1-10 ◽  
Author(s):  
Aly Mousaad Aly
Keyword(s):  
Vibration Control ◽  
Control Algorithm ◽  
Fuzzy Logic Controller ◽  
Mr Damper ◽  
Maximum Energy ◽  
Magnetorheological Damper ◽  
Control Algorithms ◽  
Earthquake Loads ◽  
Building Model ◽  
Lyapunov Controller

This paper presents vibration control of a building model under earthquake loads. A magnetorheological (MR) damper is placed in the building between the first floor and ground for seismic response reduction. A new control algorithm to command the MR damper is proposed. The approach is inspired by a quasi-bang-bang controller; however, the proposed technique gives weights to control commands in a fashion that is similar to a fuzzy logic controller. Several control algorithms including decentralized bang-bang controller, Lyapunov controller, modulated homogeneous friction controller, maximum energy dissipation controller, and clipped-optimal controller are used for comparison. The new controller achieved the best reduction in maximum interstory drifts and maximum absolute accelerations over all the control algorithms presented. This reveals that the proposed controller with the MR damper is promising and may provide the best protection to the building and its contents.

VIBRATION CONTROL OF A LIFT SYSTEM USING MAGNETORHEOLOGICAL DAMPER

2015 ◽  
Author(s):  
Angelo Marcelo Tusset ◽  
Douglas Roca Santo ◽  
Alexandre de Castro Alves ◽  
José Manoel Balthazar ◽  
Vinícius Piccirillo ◽  
...  
Keyword(s):  
Vibration Control ◽  
Magnetorheological Damper

Experimental Study on Multi-Mode Vibration Control of a Stay Cable with a Passive Magnetorheological Damper

2013 ◽  
Vol 361-363 ◽  
pp. 1402-1405
Author(s):  
Zhi Hao Wang
Keyword(s):  
Vibration Control ◽  
Mr Damper ◽  
Magnetorheological Damper ◽  
Test Results ◽  
Stay Cable ◽  
Mr Dampers ◽  
Stay Cables ◽  
Modal Damping ◽  
Mode Vibration ◽  
Multi Mode

Effective vibration control technology for stay cables is extremely critical to safe operations of cable-stayed bridges. For super-long cables, passive linear damper cannot provide sufficient damping since it can be only optimum for a given mode of cable, while a long cable may vibrate with several modes. This paper focuses on multi-mode vibration control of stay cables with passive magnetorheological (MR) dampers. Firstly, a 21.6m-long model cable was designed and established in the laboratory.Then, control performance of the cable with a passive MR damper was tested. The test results show that modal damping ratios of the cable in the first four modes can be improved significantly with the MR damper. It is further demonstrated that optimal tuned passively operated MR damper can outperform the passive viscous damper.

scholarly journals Vibration control of FSAE quarter car suspension test rig using magnetorheological damper

2020 ◽  
Vol 17 (3) ◽  
pp. 1281
Author(s):  
Muhammad Adhar Bagus ◽  
Azizan As’arry ◽  
Hesham Ahmed Abdul Mutaleb Abas ◽  
Abdul Aziz Hairuddin ◽  
Mohd Khair Hassan
Keyword(s):  
Vibration Control ◽  
Natural Frequency ◽  
Pid Controller ◽  
Mr Damper ◽  
Magnetorheological Damper ◽  
Test Rig ◽  
Damping Force ◽  
Car Suspension ◽  
Quarter Car ◽  
Suspension Test

Recently MRF damper -which has a significant controllable damping force - used frequently in many active and semi-active suspension systems. However, MRF damper needs controller to estimate the desired force to dissipate the occurred vibration instantaneously. PID controller is one of the effective feedback controllers which shows robustness and simplicity in control MRF dampers, but still the parameters of the PID controller under study to find out the optimum values. This study focused on the vibration control using Magneto-rheological (MR) damper on a FSAE quarter car suspension test rig to study and obtain the optimum running condition. The test rig was designed, modified and then tested using a P-controller integrated with MR damper, unbalance mass used as disturbance and analyzed using LABVIEW software in time and frequency domains. The natural frequency obtained was 2.2 Hz were similar to the actual FSAE car natural frequency. Based on the acceleration against time graph with different proportional gain value the optimal value for proportional gain, Kp was 1. Hence, the experiment work could be used as the initial stage to study and develop a robust controller to suppress vibration on a car.

scholarly journals Multiphysics Analysis of a Magnetorheological Damper

2019 ◽  
Vol 69 (3) ◽  
pp. 230-235 ◽  
Author(s):  
A. J. D. Nanthakumar ◽  
J. Jancirani ◽  
S. C. Rajasekaran ◽  
K. Sarathkumar
Keyword(s):  
Shear Stress ◽  
Fluid Flow ◽  
Magnetic Flux ◽  
Vibration Control ◽  
Magnetorheological Damper ◽  
Flux Analysis ◽  
Fluid Viscosity ◽  
Damping Force ◽  
Magnetorheological Damping ◽  
Potential Tool

     A Magnetorheological damping has evolved as a potential tool in vibration control. The design of magnetorheological damping involves analysis of fluid flow principles and electromagnetic flux analysis. This research paper involves design and analysis of a magnetorheological damper employed for vibration control. The analysis is carried over by considering the domain as an axisymmetric model. The damping force of the damper depends upon the shear stress due to fluid viscosity and yield stress induced due to magnetic flux applied. The damping force generated by the damper is calculated.

Vibration Control in Turbomachinery Blading Using Lacing Wires

1995 ◽  
Author(s):  
Robert X. Wang ◽  
Graham M. Chapman
Keyword(s):  
Finite Element ◽  
Vibration Control ◽  
Dynamic Characteristics ◽  
Vibration Analysis ◽  
Finite Element Modelling ◽  
Speckle Pattern ◽  
Electronic Speckle Pattern Interferometry ◽  
Element Modelling ◽  
Wire Vibration ◽  
Theoretical Results

Abstract In turbomachinery practice the use of inter-blade coupling is an accepted procedure. The use of lacing wires in highly stressed short blading introduces damping and also modifies the vibration characteristics of the blading. This paper reports on a study into the dynamic characteristics of single blades with a lacing wire. Vibration analysis is carried out using finite element modelling. The theoretical results are verified using Electronic Speckle Pattern Interferometry technique (ESPI).

Experimental Study on Performance Characteristics of Magnetorheological Damper

2010 ◽  
Vol 37-38 ◽  
pp. 439-443 ◽  
Author(s):  
Zhen Ning Hou ◽  
Zhi Min Feng ◽  
Hai Gang Hu ◽  
Guang Bin Wu
Keyword(s):  
Experimental Study ◽  
Vibration Control ◽  
Dynamic Testing ◽  
Active Vibration Control ◽  
Mr Damper ◽  
Performance Characteristics ◽  
Magnetorheological Damper ◽  
Structural Vibration ◽  
Structural Vibration Control ◽  
Active Vibration

MR dampers are new kind of the most promising devices for structural vibration control. In this paper, an overview of the structure and working principle of shear-valve mode magnetorheological (MR) damper is given. An experimental study was carried out to test the performance characteristics of a shear-valve mode MR damper, its dynamic testing was performed on a Material Testing System (MTS) under sinusoidal and triangle excitation. Based on experimental data, the dynamic characteristics, energy dissipation and dynamic response time were analyzed. The present work lays down a foundation for MR damper application in the semi-active vibration control system.

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