Modeling hysteretic characteristics of MR-fluid damper and model validation

2003 ◽  
Author(s):  
Xiao Qing Ma ◽  
En Rong Wang ◽  
S. Rakheja ◽  
C.-Y. Su
Keyword(s):  
Model Validation ◽  
Mr Fluid ◽  
Fluid Damper ◽  
Hysteretic Characteristics ◽  
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.

Modelling the hysteretic characteristics of a magnetorheological fluid damper

2003 ◽  
Vol 217 (7) ◽  
pp. 537-550 ◽  
Author(s):  
En Rong Wang ◽  
Xiao Qing Ma ◽  
S Rakhela ◽  
C Y Su
Keyword(s):  
Measured Data ◽  
Test Conditions ◽  
Proposed Model ◽  
Wide Range ◽  
Fluid Damper ◽  
Linear Rise ◽  
Force Velocity ◽  
Hysteretic Characteristics ◽  
Mr Fluid Damper ◽  
Excitation Conditions

A generalized model is proposed to characterize the biviscous hysteretic force characteristics of a magnetorheological (MR) fluid damper using symmetric and asymmetric sigmoid functions on the basis of a fundamental force generation mechanism, observed qualitative trends and measured data under a wide range of control and excitation conditions. Extensive laboratory measurements were performed to characterize the hysteretic force properties of an MR damper under a wide range of magnitudes of control current and excitation conditions (frequency and stroke). The global model is realized upon formulation and integration of component functions describing the preyield hysteresis, saturated hysteresis loop, linear rise and current-induced rise. The validity of the proposed model is demonstrated by comparing the simulation results with measured data in terms of hysteretic forcedisplacement and force-velocity characteristics under a wide range of test conditions. The results revealed reasonably good agreement between the measured data and model results, irrespective of the test conditions considered. The results of the study suggest that the proposed model could be effectively applied for characterizing the damper hysteresis and for development of an optimal controller for implementation in vehicular suspension applications.

155 Development of the MR Fluid damper

2013 ◽  
Vol 2013 (0) ◽  
pp. 20-21
Author(s):  
Yuta SANO ◽  
Eigi MURAYAMA ◽  
Yukio KAWAKAMI ◽  
Akiyoshi HORIKAWA ◽  
Kouzi SHIODA
Keyword(s):  
Mr Fluid ◽  
Fluid Damper ◽  
Mr Fluid Damper

Test Comparison of Damping Effect for Engine Damper Based on Rubber and MR Fluid Damper

2013 ◽  
Vol 397-400 ◽  
pp. 581-584
Author(s):  
Chun Lan Liang ◽  
Jian Wei Ma ◽  
Fei Zha
Keyword(s):  
Comparative Analysis ◽  
Diesel Engine ◽  
Test Data ◽  
Bench Test ◽  
Mr Fluid ◽  
Damping Effect ◽  
Fluid Damper ◽  
Mr Fluid Damper ◽  
Rubber Damper

The damping effect of 485 diesel engine is taken as research object, on the same conditions, bench test is conducted respectively to self-developed MR fluid damper and traditional rubber damper, comparative analysis of domain and spectrum are conducted to collected test data using MATLAB, the results show that damping effect of MR fluid damper to engine is significantly superior to effect of traditional rubber damper.

Experimental Investigation on Boring Tool Vibration Control Using MR Fluid Damper

2016 ◽  
Vol 15 (01) ◽  
pp. 13-25 ◽  
Author(s):  
E. Mohan ◽  
U. Natarajan
Keyword(s):  
Vibration Control ◽  
Research Work ◽  
Machining Process ◽  
Work Piece ◽  
Mr Fluid ◽  
Tool Vibration ◽  
Fluid Damper ◽  
Boring Tool ◽  
Mr Fluid Damper

In the manufacturing industry, most of the components are made by machining operations. The performance of the product to a large extent is dependent on the accuracy and consistency of the machining processes. Various parameters are considered to achieve the high quality of the machining. Out of which, vibration is one of the important parameters that will lead poor quality of the product and also reduce the tool life. Vibrations are induced by metal cutting operation during machining. Turning operations and especially boring operations are associated with severe vibration-related problems. Boring operation is often done with a boring bar, which is necessarily long and slender so that it can fit into the multipart work piece geometry. Such tools are lack of dynamic stiffness and stability, this manufacturing operation is repeatedly plagued with self-excited vibrations known as chatter. Magnetorheological (MR) fluid is employed in this research work to control the vibration of a boring tool. The MR fluid damper has received great attention due to its ability to reversibly change from a free flowing, linear, viscous liquid to a semi-solid when exposed to magnetic fields in just a few milliseconds and was also found to be effective in suppressing tool vibration. Vibration control during machining process is an important tactic to suppress the chatter vibration. The aim of this approach is to reduce the relative displacements between the tool and the work piece during the machining process.

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