scholarly journals A STUDY ON CONTROL METHOD BY MAGNETO RHEOLOGICAL FLUID DAMPER IN BASE ISOLATED STRUCTURES

2008 ◽  
Vol 73 (627) ◽  
pp. 709-716
Author(s):  
Yoko SAGAMI ◽  
Norio HORI ◽  
Norio INOUE
Keyword(s):  
Control Method ◽  
Fluid Damper ◽  
Isolated Structures ◽  
Magneto Rheological

Vibration Analysis and Control of Nuclear Power Crane with MRFD

2018 ◽  
Vol 10 (08) ◽  
pp. 1850093 ◽  
Author(s):  
Yi Xiao Qin ◽  
Bo Lun Li ◽  
Xin Li ◽  
Yan Qing Li ◽  
Zhi De Zhang ◽  
...  
Keyword(s):  
Vibration Control ◽  
Working Conditions ◽  
Control Strategy ◽  
Vibration Analysis ◽  
Nuclear Power ◽  
Control Method ◽  
Control Model ◽  
Fluid Damper ◽  
Magneto Rheological ◽  
And Control

The nuclear power crane is required to have high security and stability, as its lifting mechanism and span structure are needed to perform predominantly in serious working conditions. A new vibration analysis and control method on the nuclear power crane is proposed to improve its stability, which is based on magneto rheological fluid damper (MRFD) and switch algorithm control strategy. The simulation is completed through dynamic model and control model. The experiment is accomplished in a serving crane. Both numerical simulated and experimental results show that the vibration of nuclear power crane is suppressed significantly with MRFD. It is proved that MRFD should be taken into consideration in the vibration control of nuclear power crane.

Design and damping characteristics of magneto‐rheological fluid damper for special object

2019 ◽  
Vol 50 (10) ◽  
pp. 1282-1286
Author(s):  
Z.T. Wu ◽  
H.B. Wang ◽  
Zhishen Wang ◽  
Chungeng Zhu ◽  
Xuhui Liu
Keyword(s):  
Damping Characteristics ◽  
Fluid Damper ◽  
Magneto Rheological

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 Numerical Model of a Hybrid Damping System Composed of a Buckling Restrained Brace with a Magneto Rheological Damper

2016 ◽  
Vol 12 (1) ◽  
pp. 13-22 ◽  
Author(s):  
Norin Filip-Vacarescu ◽  
Cristian Vulcu ◽  
Dan Dubina
Keyword(s):  
Dissipative System ◽  
Control Unit ◽  
Active System ◽  
Seismic Engineering ◽  
Buckling Restrained Brace ◽  
Fluid Damper ◽  
Magneto Rheological ◽  
Hybrid Damper ◽  
Reference Parameters ◽  
Mr Fluid Damper

Abstract This paper discusses the concept of a hybrid damper made from a combination of two dissipative devices. A passive hysteretic device like steel Buckling Restrained Brace (BRB) can be combined with a magneto-rheological (MR) Fluid Damper in order to obtain a hybrid dissipative system. This system can work either as a semi-active system, if the control unit is available, or as a passive system, tuned for working according to performance based seismic engineering (PBSE) scale of reference parameters (i.e. interstory drift).

scholarly journals Comparison of Control Strategy on Magneto-Rheological Fluid Damper Performance for Impact Reduction

2019 ◽  
Vol 530 ◽  
pp. 012032
Author(s):  
M S Rahmat ◽  
K Hudha ◽  
Z A Kadir ◽  
N R M Nuri ◽  
N H Amer ◽  
...  
Keyword(s):  
Control Strategy ◽  
Impact Reduction ◽  
Fluid Damper ◽  
Magneto Rheological

Vibration suppression of railway vehicles using a magneto-rheological fluid damper and semi-active virtual tuned mass damper control

2019 ◽  
Vol 67 (6) ◽  
pp. 493-507
Author(s):  
Ji-Hwan Shin ◽  
Jin-Ho Lee ◽  
Won-Hee You ◽  
Moon K. Kwak
Keyword(s):  
Control Algorithm ◽  
Mr Damper ◽  
Tuned Mass Damper ◽  
Railway Vehicle ◽  
Car Body ◽  
Fluid Damper ◽  
Mass Damper ◽  
Damper Control ◽  
Magneto Rheological ◽  
Mr Fluid Damper

A semi-active virtual tuned mass damper (SAVTMD) control algorithm is developed to suppress vibrations of a railway vehicle by using magneto-rheological (MR) damper. To this end, a virtual-tuned-mass-damper control algorithm analogous to the tuned mass damper was developed prior to the semi-active application. The proposed SAVTMD control algorithm uses the acceleration of the car body directly, so that it is more practical than the sky-hook control algorithm that uses the velocity of the car body. The application of the SAVTMD control to a real MR fluid damper is discussed, and a step-by-step procedure to calculate the command voltage to the driver of the MR fluid damper is presented. A hardwarein-the-loop simulation system developed in the previous study is used to test the SAVTMD control algorithm. The theoretical and experimental results showed that the proposed SAVTMD control algorithm is more effective than is the semi-active sky-hook control in suppressing vibrations of the car body of the railway vehicle by the MR damper.

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