Design and Modeling of a Magnetorheological Valve with Both Annular and                 Radial Flow Paths

Ai, H. X.; Wang, D. H.; Liao, Wei-Hsin

doi:10.1177/1045389x06055283

Cited by 75 publications

(78 citation statements)

References 10 publications

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“…The mathematical expressions for the radial gap damping force for the viscous and field-dependent yield stress are represented by [24]…”

Section: Analytical Modelmentioning

confidence: 99%

“…The fundamental principle of the MR damper is similar to that of the conventional passive damper, which dissipates kinetic energy as heat through the flow restriction mechanism. The restriction of the fluid flow generates a reaction force perceived as a damping force [7,[22][23][24][25]. In the conventional passive damper, the flow restriction is caused by the piston orifice acting as a fixed valve.…”

Section: Introductionmentioning

confidence: 99%

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A Concentric Design of a Bypass Magnetorheological Fluid Damper with a Serpentine Flux Valve

Idris¹,

Imaduddin

Ubaidillah

et al. 2020

Actuators

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This work presents a new concentric design structure of a bypass magnetorheological (MR) damper with a serpentine flux valve type. In this design, the serpentine valve is installed not in the middle of the piston but on the bypass channel of the damper. However, to make it less bulky, the location of the valve installation is chosen to be in line with the cylinder axis, which is different from the common configuration of the bypass damper. With the proposed design concept, the performance flexibility of the bypass configuration and the compactness of the piston valve configuration can be accomplished. In this study, these benefits were demonstrated by firstly deriving an analytical model of the proposed MR damper focusing on the bypass concentric valve structure, which is vital in determining the damping force characteristics. The prototype of MR damper was also fabricated and characterized using the dynamic test machine. The simulation results show that the damping force could be adjusted from 20 N in the off-state to around 600 N in the on-state with 0.3 A of excitation current. In the experiments, during low piston velocity measurement, the on-state results from the simulation were generally in good agreement with the experimental results. However, with the increase in piston velocity, the deviation between the simulation and the experiment gets higher. The deviations are most probably due to seal frictions that were not accounted for in the model. The seal friction is probably dominant as the seals in the prototype need to be prepared for handling higher fluid pressure. As a result, the frictions are quite prevalent and significantly affect the measured off-state damping forces as well, where it was recorded ten times higher than the predicted values from the model. Nevertheless, although there were deviations, the dynamic range of the concentric bypass structure is still 1.5 times higher than the conventional structure and the new structure can be potentially explored more to achieve an improved MR damper design.

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“…The mathematical expressions for the radial gap damping force for the viscous and field-dependent yield stress are represented by [24]…”

Section: Analytical Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Concentric Design of a Bypass Magnetorheological Fluid Damper with a Serpentine Flux Valve

Idris¹,

Imaduddin

Ubaidillah

et al. 2020

Actuators

View full text Add to dashboard Cite

show abstract

“…Therefore, when it used in semi-active hydraulic mount of vehicles, it has excellent vibration isolation effect (Phu and Choi, 2015). According to the difference between the flow direction of MRF and the direction of applied magnetic field, the working modes can be divided into flow mode (Ai et al, 2006; Imaduddin et al, 2015; Kim et al, 2016), squeeze mode (Farjoud et al, 2011), shear mode (Wereley et al, 2008), and mixed mode (Nguyen et al, 2012). Chen et al (2016) presented a magneto-rheological (MR) mount in squeeze mode, formulated the mathematical model of squeeze mode MR mount considering the fluid inertia, MR effect and hysteresis property, and the validity of the model was verified by comparing the analysis results with the experimental results.…”

Section: Introductionmentioning

confidence: 99%

Optimal design and experimental evaluation of magneto-rheological mount applied to start/stop mode of vehicle powertrain

Deng

Qing-hua

Yang

2020

Journal of Intelligent Material Systems and Structures

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Magneto-rheological mount is one of the most effective vibration isolation devices for the vibration isolation system of vehicle powertrain. In this article, a flow type of magneto-rheological mount was proposed to control the vibration and the torque excitation of the engine when vehicle was in start/stop mode. A mathematical model for the flow type of magneto-rheological mount was formulated with consideration of the influence of current on magneto-rheological fluid viscosity and the relationship between liquid resistance effect and flow rate in damping gap. Then, a co-simulation optimal platform was developed by the Isight and the ANSYS, and the non-dominated sorting genetic algorithm II was used to optimize magnetic circuit. Subsequently, two prototypes of magneto-rheological mounts were manufactured according to the initial design and the optimal design model, and the dynamic performance test of magneto-rheological mount monomer and the vibration isolation performance test of the whole vehicle under start/stop mode were carried out, respectively. The experimental results showed that the controllability and the vibration isolation performance of the optimal design magneto-rheological mount were significantly improved compared with the initial design.

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“…Generally, MR fluids are operated in four main modes: valve mode, direct shear mode, squeeze mode and pinch mode (Goncalves and Carlson, 2009; Rossa et al, 2014a). MR actuators can be built in dampers (Parlak et al, 2012; Weber, 2014), valves (Ai et al, 2006; Nguyen et al, 2009), clutches (Shafer and Kermani, 2011; Yadmellat and Kermani, 2014) and brakes (Rossa et al, 2014b; Shiao et al, 2016). They have showed great potential in the fields of vibration control (Choi et al, 2000), rehabilitation (Gudmundsson et al, 2010), robotics (Saito and Ikeda, 2007) and haptics (Blake and Gurocak, 2009; Senkal and Gurocak, 2011).…”

Section: Introductionmentioning

confidence: 99%

Design and evaluation of a small-scale multi-drum magnetorheological brake

Qin

Song

Zeng

et al. 2018

Journal of Intelligent Material Systems and Structures

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Magnetorheological fluid, whose rheological properties can be continuously and reversely changed, is a new-type smart material. Based on magnetorheological fluid, magnetorheological brake is a potential actuation method in haptics due to its desirable features, such as inherent passiveness and high compactness. Most of the existing magnetorheological brakes are powerful enough, but they are too bulky and heavy. If they were smaller and lighter, they would be more favourable for haptics. In this article, a small-scale yet powerful magnetorheological brake was designed, modelled and evaluated. We adopted a novel multi-drum architecture to activate more shearing areas within a limited volume. To obtain an ideal sealing effect and reduce the off-state friction, the ferro-fluidic sealing technique was used. The ferro-fluidic sealing assemblies can be assembled from both sides of the shaft. The current–torque model of this brake was derived to predict the torque output based on the current input. The optimal design has the diameter of 28 mm and the width of 23.5 mm. It can provide the maximum and minimum torque of 403 and 4 N mm, respectively, giving the torque–volume ratio of 27.864 kN/m2 and the dynamic range of about 40 dB with the 54 ms time constant.

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Design and Modeling of a Magnetorheological Valve with Both Annular and Radial Flow Paths

Cited by 75 publications

References 10 publications

A Concentric Design of a Bypass Magnetorheological Fluid Damper with a Serpentine Flux Valve

A Concentric Design of a Bypass Magnetorheological Fluid Damper with a Serpentine Flux Valve

Optimal design and experimental evaluation of magneto-rheological mount applied to start/stop mode of vehicle powertrain

Design and evaluation of a small-scale multi-drum magnetorheological brake

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