Electrorheological Fluid Based Clutches and Brakes

Kęsy, Z.; Mędrek, Grzegorz; Olszak, Artur; Osowski, Karol; Kęsy, A.

doi:10.1016/b978-0-12-803581-8.11722-9

Cited by 10 publications

(9 citation statements)

References 10 publications

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“…The difficulty in determining the ERC transfer functions parameters results from the fact that the clutch operation is unstable, and the measurements of the torque M are unique. The ERC operation instability is mainly caused by the following factors: the occurrence of leakage current and electric breakdowns in the fluid, the randomness of solid particles forming spatial structures (Jun and Lamei, 2018; Mikkelsen et al, 2017) the strong dependence of the fluid’s properties on temperature changes (Kęsy et al, 2022) as well as changes in the ER fluid’s humidity, and the wear of the ER fluid (Ziabska et al, 2017). Moreover, the instability of the ERC is strongly influenced by the operation of the brushes transferring the voltage to the slip rings located on the input shaft.…”

Section: Resultsmentioning

confidence: 99%

“…During the selection of the ER fluid, it is taken into consideration that the torque transferred by ERC is dependent on two factors: plastic viscosity m p of the ER fluid and the angular velocity Dv. The latter depends on the yield stress t 0 of the ER fluid, which is a function of the voltage producing the electric fiel (Ke ˛sy et al, 2022). Due to the fact that ERC is controlled by changing the voltage U, it is necessary to select a fluid for which the ratio of the second to the first torque component shall be as large as possible, that is, the t 0 /m 0 ratio is also as large as possible.…”

Section: Test Objectmentioning

confidence: 99%

“…The torque can be changed faster by the means of changing the electrical voltage rather than by changing the angular velocities (Nakamura et al, 2002). However, in this case, the reaction time of the clutch is limited by the time of electric voltage rise on the discs of the clutch (Ke ˛sy et al, 2022). In contrast, the control range of the clutch is limited by the maximum voltage that can be applied to the electrodes.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Parameter estimation of transfer function of viscous clutch with electrorheological fluid and torque control

Musiałek,

Kesy,

Olszak

et al. 2023

Journal of Intelligent Material Systems and Structures

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This article concerns the identification of a transfer function which contains principal design and dynamic parameters of a hydraulic viscous disc clutch operated and controlled by an electrorheological (ER) fluid as a working fluid. A mathematical model of clutch dynamics is created as part of the clutch identification. It is considered that the changes in torque over time are described by transfer function represented by the first-order system with time delay. A prototypic clutch and a test bench are constructed, and tests are performed. A high voltage step input is used to trigger the torque changes. Constant parameters of the first-order system with time delay are identified on the basis of bench tests. According to the values of these parameters, a proportional-integral (PI) controller is selected for the closed-loop control system. It is found that operation of such a control system utilizing the identified design parameters is acceptable with high accuracy under external disturbances.

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Section: Resultsmentioning

confidence: 99%

Section: Test Objectmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Parameter estimation of transfer function of viscous clutch with electrorheological fluid and torque control

Musiałek,

Kesy,

Olszak

et al. 2023

Journal of Intelligent Material Systems and Structures

Self Cite

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“…Due to high sensitivity (millisecond response), low energy consumption, simple structure, and low price of ER fluids, ER devices can facilitate the realization of mechanical-electrical conversion, such as the performance optimization of shock absorbers, clutches, and dampers (Kamelreiter et al, 2012;Kesy, et al, 2022b). Papadopoulos designed and manufactured multi-disc ER brakes or clutches.…”

Section: Introductionmentioning

confidence: 99%

Shear Motion Characteristics Analysis of Electrorheological Fluids Between Flat Disk and Corrugated Disk

Chen

Huang

2022

Front. Mater.

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In order to improve the transmission torque caused by the electrorheological effect, a corrugated disk is proposed to replace traditional flat disk by changing the electrode surface shape. The new mechanism puts the device in a shear-squeeze mode of operation. Based on the constitutive equation of electrorheological fluids, the shear motion characteristics of the ER fluids between the flat disk and the corrugated disk are analyzed, including the pressure distribution, torque equations, and the comparison with double-flat-disk mechanism. The analysis shows that compared with the double-flat-disk structure, the flat-disk-corrugated-disk structure can enhance the transmitted torque over 2.6 times under the same operating parameters. The magnification of the torque is not related with the curve number of the corrugated disc, but mainly depends on the structural parameters of the device and corrugations, and the characteristic parameters of electrorheological fluid. It is proved that the mechanism can provide new ideas and new methods for the engineering application of electrorheological transmission technology.

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“…Electrorheological (ER) and magnetorheological (MR) fluids due to theability to change their properties under the influence of electric and magnetic field [7][8][9][10], are used in various engineering, such as valves [3,[11][12][13][14][15][16][17][18], hydraulic vibration dampers [19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34], hydraulic actuators [35,36], seat suspension for vehicles [37], and hydraulic clutches [38][39][40][41][42][43][44][45].…”

Section: Introductionmentioning

confidence: 99%

Analysis of a combined clutch with an electrorheological fluid

Musiałek

Migus

Olszak

et al. 2020

Smart Mater. Struct.

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The article introduces the structure and results of experimental research concerning a specifically constructed combined clutch with an electrorheological (ER) fluid, controlled by changing the strength of electric field. The clutch consists of over a dozen parallelly connected hydraulic clutches with ER fluid. The purpose of the experimental research is to identify the steady-state and dynamic characteristics which are vital in the construction process of the combined clutch, including the selection of the control system. Depending on which singular clutch of the combined clutch construction is the one where the electric field is generated, an increase or decrease of the torque value is obtained.

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Electrorheological Fluid Based Clutches and Brakes

Cited by 10 publications

References 10 publications

Parameter estimation of transfer function of viscous clutch with electrorheological fluid and torque control

Parameter estimation of transfer function of viscous clutch with electrorheological fluid and torque control

Shear Motion Characteristics Analysis of Electrorheological Fluids Between Flat Disk and Corrugated Disk

Analysis of a combined clutch with an electrorheological fluid

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