A Low Force Magneto-rheological (MR) Fluid Damper: Design, Fabrication and Characterization

2007 ◽  
Vol 18 (12) ◽  
pp. 1155-1160 ◽  
Author(s):  
Gokhan Aydar ◽  
Cahit A. Evrensel ◽  
Faramarz Gordaninejad ◽  
Alan Fuchs
Keyword(s):  
Mr Fluid ◽  
Fluid Damper ◽  
Fabrication And Characterization ◽  
Damper Design ◽  
Magneto Rheological ◽  
Mr Fluid Damper

Experimental Investigation on Dynamic Characteristics of Magneto-Rheological Fluid Suspension through on Road Comfort Testing

2015 ◽  
Vol 772 ◽  
pp. 373-377
Author(s):  
K.G. Saravanan ◽  
N. Mohanasundara Raju
Keyword(s):  
Experimental Investigation ◽  
Ride Comfort ◽  
Vehicle Dynamic ◽  
Dynamic Approach ◽  
Mr Fluid ◽  
Road Profile ◽  
Fluid Damper ◽  
Magneto Rheological ◽  
Active Damper ◽  
Mr Fluid Damper

The present study deals with the application of the Magneto-Rheological (MR) fluid assisted semi-active damper as a replacement to the conventional suspension system in Maruti 800 car (source vehicle). MR fluid damper is designed, fabricated and automated with a microcontroller. This experimentation is carried out with real time instrumentation on the selected road profile as a vehicle dynamic approach. Results obtained from the travel imply that MR fluid suspension suppresses the vibrations more effectively than the existing passive damper system. The MR fluid dampens the acceleration and displacement of the piston to a greater extent thereby controlling the ride comfort.

Study on Design Method for Magneto-Rheological Fluid Damper Based on Squeeze Mode and Experimental Tests

2011 ◽  
Vol 199-200 ◽  
pp. 97-101 ◽  
Author(s):  
Chang Rong Liao ◽  
Li Juan Fu ◽  
Ying Yang
Keyword(s):  
Analytical Method ◽  
Vibration Isolation ◽  
Squeeze Flow ◽  
Damping Force ◽  
Mr Fluid ◽  
Isolation System ◽  
Technical Requirements ◽  
Fluid Damper ◽  
Magneto Rheological ◽  
Mr Fluid Damper

A Magneto-rheological(MR) fluid damper based on squeeze model is put forward. The squeeze flow differential equation is obtained. Navier slip condition is considered on two boundary surfaces and compatible condition is established. The radial velocity profile and the radial pressure distributions are derived respectively. The mathematical expression of damping force is devloped. In order to verify rationality of analytical method, MR fluid damper based on squeeze mode is designed and fabricated according to technical requirements of engine vibration isolation system. The experimental damping forces from MTS870 Electro-hydraulic Servo with sine wave excitation show that analytical method proposed in this paper is feasible and has the reference value to design MR fluid damper based on squeeze mode.

scholarly journals Modeling of a magneto-rheological (MR) fluid damper using a self tuning fuzzy mechanism

2009 ◽  
Vol 23 (5) ◽  
pp. 1485-1499 ◽  
Author(s):  
Kyoung Kwan Ahn ◽  
Dinh Quang Truong ◽  
Muhammad Aminul Islam
Keyword(s):  
Mr Fluid ◽  
Fluid Damper ◽  
Self Tuning ◽  
Magneto Rheological ◽  
Mr Fluid Damper

Series damper actuator system based on MR fluid damper

Robotica ◽  
2006 ◽  
Vol 24 (6) ◽  
pp. 699-710 ◽  
Author(s):  
Chee-Meng Chew ◽  
Geok-Soon Hong ◽  
Wei Zhou
Keyword(s):  
Force Feedback ◽  
Mr Damper ◽  
Viscous Damper ◽  
Control Loop ◽  
Bingham Model ◽  
Mr Fluid ◽  
Fluid Damper ◽  
Actuator System ◽  
Magneto Rheological ◽  
Mr Fluid Damper

In our recent work, we have proposed a novel force control actuator system called series damper actuator (SDA). We have since built an SDA system based on magneto-rheological fluid (MR) damper. In this paper, the dynamics property of SDA system based on the MR fluid damper (SMRDA) is investigated. The effect of the extra dynamics introduced by the MR fluid damper is revealed by comparing the SMRDA with the SDA system based on a linear Newtonian viscous damper (SNVDA). To linearize the constitutive property of the MR fluid damper, a modified Bingham model is proposed. A force feedback control loop is implemented after the linearization. An experimental SMRDA is built to illustrate the performance of the SDA system.

DEVELOPMENT OF AN INTERACTIVE MR FLUID EXPERIMENT FOR SMART MATERIALS CURRICULA

2005 ◽  
Vol 19 (07n09) ◽  
pp. 1478-1484
Author(s):  
R. BANNEROT ◽  
G. SONG
Keyword(s):  
Smart Materials ◽  
Resistance Level ◽  
Mr Fluid ◽  
University Of Houston ◽  
Mr Fluids ◽  
Hands On ◽  
Fluid Damper ◽  
Semi Solid ◽  
Magneto Rheological ◽  
Mr Fluid Damper

This paper presents the development of an interactive MR (Magneto-Rheological) fluid experiment. The hands-on experiment is developed to introduce MR fluids to students who are interested in this smart fluid. This apparatus is also used as a teaching tool for courses in smart materials. The experiment is designed to show students the basic operations of MR fluids and some common applications. This interactive experiment includes three devices with associated control buttons and all the devices are housed in a clear display case for easy visualization. 1) MR fluid morphing device, which clearly shows the morphing of MR material between fluid and semi-solid with the control of the electromagnet. 2) MR brake, which allow a user clearly feel the change of resistance level of the crank shaft with increasing of current to the electromagnets. 3) Vibration damping using MR fluid damper, which shows that the vibration of a platform induced by a rotating motor with an imbalanced mass can be suppressed by a simple MR fluid damper. This interactive experiment is fully autonomous and has been used in University of Houston. It has been demonstrated that it is an effective tool to assist student to learn MR fluids.

MR Damper That Utilizes Multi Pole Electromagnets

2014 ◽  
Author(s):  
Taichi Matsuoka ◽  
Tomohiro Sugita ◽  
Katsuaki Sunakoda
Keyword(s):  
Dynamic Performance ◽  
Control Variable ◽  
Magnetic Flux Density ◽  
Mr Fluid ◽  
Damping Effect ◽  
Fluid Damper ◽  
Variable Damping ◽  
Magneto Rheological ◽  
Mr Fluid Damper ◽  
Force Characteristics

The authors propose a Magneto-Rheological (MR) fluid damper that utilizes multi pole electromagnets in order to control variable damping effect such as a semiactive damper. The damper consists of a piston, a cylinder, a by-pass pipe, 8 electromagnets, and MR fluid. The electromagnets are installed octagonal around the pipe. When each electromagnet can control both of the magnetic flux density and direction, resisting force can be switched by several types of magnetic field such as artificial orifice. The test damper is manufactured. Resisting force characteristics are measured by using a shaking actuator. Finally, dynamic performance of the damper is confirmed experimentally.

Researches of a Magneto-Rheological Fluid Damper with External Coil Based on Electromagnetic Finite Element Analysis

2012 ◽  
Vol 490-495 ◽  
pp. 3427-3431
Author(s):  
Xiao Mei Xu ◽  
Cai Min Zeng
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Element Analysis ◽  
Mr Fluid ◽  
Damping Characteristics ◽  
Fluid Damper ◽  
New Type ◽  
Fluid Dampers ◽  
Magneto Rheological ◽  
Mr Fluid Damper

In vibration control field magneto-rheological (MR) fluid dampers are semi-active control devices that have recently begun to receive more attention. This paper presents a new type of MR fluid damper with external coil. The new structure of the damper was optimized and analyzed based on a static magnetic analysis with the help of electromagnetic finite element analysis (FEA) using the software of ANSYS. The damping characteristics of the damper were theoretically researched. Research results show that the designed MR fluid damper with external coil has wider scope of damping adjustment and strong energy-dissipating ability. The study method in this paper and the obtained results will help designers to create more efficient and reliable MR fluid dampers.

Advanced Suspension Systems for Wheeled Military Vehicles

2005 ◽  
Author(s):  
Nader Vahdati ◽  
Yap Fook Fah ◽  
Koh Yong Khiang ◽  
Kiew Woon Hwee
Keyword(s):  
Control Policy ◽  
Suspension System ◽  
Matlab Simulation ◽  
Test Rig ◽  
Mr Fluid ◽  
Military Vehicles ◽  
Fluid Damper ◽  
Quarter Car ◽  
Magneto Rheological ◽  
Mr Fluid Damper

To allow wheeled military vehicles to travel at higher speeds on off highway roads, the primary suspension system needs to be semi-active or fully active. To develop a semi-active or a fully active suspension system for wheeled military vehicles, instead of the actual vehicle, a simpler and a better controlled system, meaning a quarter car test rig was used. The quarter car test rig consists of a tire, a spring, a Magneto-Rheological fluid (MR-fluid) damper, a double wishbone suspension system, and a mass representing a quarter car chassis. This paper documents the quarter car test rig design, its mathematical model, its MATLAB simulation results, and experimental test results collected on the actual test rig with the damper in the OFF state versus the semi-active state. The Ground-hook semi-active control policy was used to control the MR-fluid damper. This control policy significantly reduces the motion of the tire at its natural frequency.

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