Hydrodynamic response time of magnetorheological fluid in valve mode: model and experimental verification

2021 ◽  
Author(s):  
Michal Kubík ◽  
Karel Šebesta ◽  
Zbyněk Strecker ◽  
Filip Jeniš ◽  
Janusz Goldasz ◽  
...  
Keyword(s):  
Response Time ◽  
Experimental Verification ◽  
Magnetorheological Fluid ◽  
Hydrodynamic Response

Response time of magnetorheological fluid–based haptic device

2015 ◽  
Vol 27 (7) ◽  
pp. 859-865 ◽  
Author(s):  
Takehito Kikuchi ◽  
Junichi Noma ◽  
Syuichi Akaiwa ◽  
Yuya Ueshima
Keyword(s):  
Response Time ◽  
Magnetorheological Fluid ◽  
Haptic Device

Response time of magnetorheological fluids and magnetorheological valves under various flow conditions

2012 ◽  
Vol 23 (9) ◽  
pp. 949-957 ◽  
Author(s):  
Huseyin Sahin ◽  
Faramarz Gordaninejad ◽  
Xiaojie Wang ◽  
Yanming Liu
Keyword(s):  
Response Time ◽  
Flow Rate ◽  
Annular Flow ◽  
Radial Flow ◽  
Response Times ◽  
Volume Flow Rate ◽  
Magnetorheological Fluid ◽  
Volume Flow ◽  
Step Input ◽  
Flow Geometry

In this study, the response times of magnetorheological fluids and magnetorheological fluid valves are studied under various flow configurations. Two types of valving geometries, annular flow and radial flow, are considered in the magnetorheological fluid valve designs. The transient pressure responses of magnetorheological fluid valves are evaluated using a diaphragm pump with a constant volume flow rate. The performance of each magnetorheological valve is characterized using a voltage step input as well as a current step input while recording the activation electric voltage/current, magnetic flux density, and pressure drop as a function of time. The variation of the response time of the magnetorheological valves under constant volume flow rate is experimentally investigated. The Maxwell model with a time constant is employed to describe the field-induced pressure behavior of magnetorheological fluid under a steady flow. The results demonstrate that the pressure response times of the magnetorheological fluid and the magnetorheological valves depend on the designs of the electric parameters and the valve geometry. Magnetorheological valves with annular flow geometry have a slower falling response time compared to their rising response time. Magnetorheological valves with radial flow geometry demonstrate faster pressure response times both in rising and in falling states.

scholarly journals Transient Magnetic Model of Magnetorheological Damper and Its Experimental Verification

2018 ◽  
Vol 153 ◽  
pp. 06002 ◽  
Author(s):  
Kubík Michal ◽  
Macháček Ondřej ◽  
Strecker Zbyněk ◽  
Roupec Jakub ◽  
Novák Petr ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Response Time ◽  
Experimental Verification ◽  
Magnetic Circuit ◽  
Material Selection ◽  
Mr Damper ◽  
Magnetorheological Damper ◽  
Dynamic Force ◽  
Mr Fluid ◽  
Magnetic Model

The present paper deals with the transient magnetic model of the magnetorheological (MR) damper and its experimental verification. The response time of MR damper affects the quality of semi-active control of this damper. The lower the response time, the higher the system efficiency. The most important part of the response time of the MR damper is the response time of magnetic field of the MR damper which can be determined by transient magnetic model. The transient magnetic model was created by the software Ansys Electromagnetics 17.1 as 2D axisymmetric and verified by measurement of magnetic field in the gap of MR damper piston. The maximum difference between the model and the experiment was 28 %. The response time depends on the electric current in the coil of MR damper. The transient magnetic model was used for determination of influence of MR fluid type, material of cover and material of magnetic circuit on the response time of magnetic field of MR damper. The type of MR fluid has a significant influence on the response time. The lower the mass concentration of ferromagnetic particles, the lower the response time of magnetic field. A material selection of magnetic circuit is always a trade-off between the response time and the maximum magnetic flux density (dynamic force range) in the gap of the MR damper. According to the verified transient magnetic model, it is possible to find a suitable material of magnetic circuit for specific application (response time).

Investigation of the response time of magnetorheological fluid dampers

2004 ◽  
Author(s):  
Jeong-Hoi Koo ◽  
Fernando D. Goncalves ◽  
Mehdi Ahmadian
Keyword(s):  
Response Time ◽  
Magnetorheological Fluid ◽  
Fluid Dampers

Research on Dynamic Response Time of Magnetorheological Fluid Dampers

2013 ◽  
Vol 278-280 ◽  
pp. 44-49
Author(s):  
Jin Qiu Zhang ◽  
Lei Zhang ◽  
Jie Yue ◽  
Yong Qiang Gao ◽  
Zhi Zhao Peng
Keyword(s):  
Dynamic Response ◽  
Response Time ◽  
Electrical Power ◽  
Magnetorheological Fluid ◽  
Electromagnetic Response ◽  
Response Process ◽  
Tracked Vehicle ◽  
Structure Response ◽  
Fluid Dampers ◽  
Power Response

In this study, one type of magnetorheological fluid dampers (MRD) used in tracked vehicle is chosen as a research object. Firstly, the dynamic response process is analyzed and the dynamic response time of MRDs is defined. In this study, we consider that the dynamic response time of MRDs includes four components, i.e. the electrical power response time, the electromagnetic response time, the response time of magnetorheological fluid (MRF) and the structure response time. The electrical power response time is tested and the electromagnetic response process and the electromagnetic response time of the MRD are analyzed through the method 3D magnetic finite element analysis. Lastly, the response time of the MRD used in tracked vehicle in various working conditions is tested by MRD response time testing system. With the comparison between testing data and analysis of the electromagnetic response process, we can conclude that the structure response time and the electromagnetic response time occupy the largest proportions of the dynamic response time of the MRD and the feasible methods to shorten the response time is to increase rigidity of the MRD system and reduce the eddy effect.

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