Lateral vibration control of a precise machine using magneto-rheological mounts featuring multiple directional damping effect

2018 ◽  
Vol 27 (3) ◽  
pp. 037001 ◽  
Author(s):  
Hyung Tae Kim ◽  
An Mok Jeong ◽  
Hyo Young Kim ◽  
Jong Wook An ◽  
Cheol Ho Kim ◽  
...  
Keyword(s):  
Vibration Control ◽  
Lateral Vibration ◽  
Damping Effect ◽  
Magneto Rheological ◽  
Precise Machine ◽  
Directional Damping

A new hybrid mount actuator consisting of air spring and magneto-rheological damper for vibration control of a heavy precision stage

2018 ◽  
Vol 284 ◽  
pp. 42-51 ◽  
Author(s):  
Chulhee Han ◽  
Seung-Bok Choi ◽  
Yang-Sup Lee ◽  
Hyung-Tae Kim ◽  
Cheol-Ho Kim
Keyword(s):  
Vibration Control ◽  
Air Spring ◽  
Precision Stage ◽  
Magneto Rheological

Vibration Control of a New Bed Stage System for Ambulance Using MR Dampers

2014 ◽  
Author(s):  
Hee-Dong Chae ◽  
Seung-bok Choi ◽  
Jong-Seok Oh
Keyword(s):  
Mathematical Model ◽  
Vibration Control ◽  
Vibration Isolation ◽  
Design Parameters ◽  
Ride Quality ◽  
Vibration Level ◽  
Mr Dampers ◽  
Secondary Damage ◽  
Stage System ◽  
Magneto Rheological

This paper proposes a new bed stage for patients in ambulance vehicle in order to improve ride quality in term of vibration control. The vibration of patient compartment in ambulance can cause a secondary damage to a patient and a difficulty for a doctor to perform emergency care. The bed stage is to solve vertical, rolling, and pitching vibration in patient compartment of ambulance. Four MR (magneto-rheological) dampers are equipped for vibration isolation of the stage. Firstly, a mathematical model of stage is derived followed by the measurement of vibration level of patient compartment of real ambulance vehicle. Then, the design parameters of bed stage is undertaken via computer simulation. Skyhook, PID and LQR controllers are used for vibration control and their control performances are compared.

Experimental Study of the Influence of Impact Mass on Damping Performance of Impact Dampers

2012 ◽  
Vol 246-247 ◽  
pp. 169-172
Author(s):  
Yan Zhu ◽  
Shi Shun Zhu ◽  
Wu Quan Liu ◽  
Shun Tang Hu
Keyword(s):  
Experimental Study ◽  
Vibration Control ◽  
Experimental Method ◽  
Total Mass ◽  
Resonance Region ◽  
Impact Damper ◽  
Damping Effect ◽  
Main System ◽  
The Impact ◽  
Impact Mass

We present a simulating experimental method used for studying the influence of impact mass on damping performance of impact dampers. The free mass in the impact damper had equal total mass but different size individual. We tested the damping effect of the damper under the same external force separately. The main results obtained in the experiments indicated that the impact damper had a good damping effect in the resonance region of the main system. The mass value of the free mass participating in vibro-impact was variable. In addition, the damping of the main system was related to the size of the free mass. In the conditions of equal total mass and same material, the size of the free mass was smaller, the effect of the vibration control was better.

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