Electrorheological Rotating Disk Clutch Mechanism Under AC Electric Field: Part I - Torque and Current Density

Shimada, Kunio; Nishida, Hitoshi

doi:10.1106/104538902029763

Cited by 4 publications

(4 citation statements)

References 5 publications

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“…Figures 10 shows total efficiency. W , AC depend mainly on W , eff and T , AC depend on T , c as seen from the other present [1].…”

Section: Ac Electric Fieldsupporting

confidence: 79%

“…We used just the same experimental apparatus with a disk-type rotating device presented previously in experimental investigations [1][2][3]. Therefore, precise explanations are omitted here.…”

Section: Methodsmentioning

confidence: 99%

“…I N [1], we experimentally investigated the torque and current density in the disk-type rotating device with a suspension-type electrorheological fluids (ERF) under an AC electric field. And then, we compared the results regarding the AC electric field with those achieved using a DC electric field, investigated on suspension-type ERF.…”

Section: Introductionmentioning

confidence: 99%

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Electrorheological Rotating Disk Clutch Mechanism Under AC Electric Field: Part II - Efficiency Metrics

Shimada

Nishida

Akagami

2002

Journal of Intelligent Material Systems and Structures

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Electric power and efficiency on a rotating disk under AC electric field with suspension-type electrorheological fluid (ERF) were investigated. This report also dealt with the time lags of torque and current density from the applied eloctric field. Especially, the time lag of the current density was arranged by the power factor. The time lag of the torque is changed larger than the one of the current density. On the other hand, the data of the torque and the current density have steady and varying characteristics as amplitude components. Therefore, we need to investigate four electric powers: apparent power, effective power, steady power from the steady component of the current density and total power. From the three electric powers, we can deal with three efficiency of the electric power to the torque. They depend on the angular velocity of the disk, frequency and intensity of the electric field. The results were explained with the particles aggregation model.

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“…Figures 10 shows total efficiency. W , AC depend mainly on W , eff and T , AC depend on T , c as seen from the other present [1].…”

Section: Ac Electric Fieldsupporting

confidence: 79%

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Electrorheological Rotating Disk Clutch Mechanism Under AC Electric Field: Part II - Efficiency Metrics

Shimada

Nishida

Akagami

2002

Journal of Intelligent Material Systems and Structures

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“…17 Investigations proceed on the development of various types of clutch and brake. Shimada and Nishida 18 describe a comprehensive experimental study to investigate the mechanical properties of an ER clutch. It was demonstrated by Tan et al 19 that twin ER clutches can provide the basis of a simple but efficient mechanism for controlling the angular position of a robot arm.…”

Section: Er Fluid Devicesmentioning

confidence: 99%

Smart fluids: current and future developments

Stanway

2004

Materials Science and Technology

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A smart fluid comprises a suspension of micrometre-sized particles in a dielectric carrier liquid. The application of a suitable stimulus -either electrical or magnetic -causes a significant increase in the resistance to flow of the fluid. Current and future developments in smart fluids are reviewed, paying particular attention to electro-rheological (ER) and magneto-rheological (MR) fluids. ER fluids have been the focus of intense academic interest over several decades. However, not until the re-discovery of MR fluids did commercial exploitation finally occur. Both microscopic and macroscopic models of smart fluids will be described. The link with industrial applications is established by introducing the three modes of operation through which smart fluids are harnessed. Insight into the behaviour of smart fluids is obtained through the development of relatively simple quasi-steady and dynamic models. A concise summary of the latest industrial applications is provided. Future trends are then considered under the headings of smart fluid technology, modelling of smart fluids and, finally, engineering devices.MST/6012

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Low-frequency dynamics of an electrorheological fluid in squeeze and shear mode. Part I: experiments

Norrick

Dohnal

Bauer

2013

Journal of Vibration and Control

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Electrorheological fluids (ERFs) offer a rapid control of damping using very low power requirements. Different models have been proposed to simulate the hysteresis phenomenon observed experimentally in ERF. This paper describes the steps to be taken to extract measurements of an ERF in squeeze and shear mode. A novel modular test facility was designed to perform measurements of a specific ERF in squeeze and shear mode. This device allows the measurement of the dynamic response of the fluid under various excitation conditions. Dense measurement grids of fluid force and electrode displacement at harmonic excitation are collected in dependency of the excitation frequency, the displacement amplitude and the applied electric field. The main problems to be solved during the setup and execution of the measurements are discussed. The steps to be taken during signal processing to achieve high-quality measurements as inputs for material model fitting are described in detail. Example measurements for both squeeze and shear mode are presented. The fitting of the obtained results to a material model for ERF and discussion of the resulting extended Bouc-Wen model will be the topic of an accompanying paper.

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Electrorheological Rotating Disk Clutch Mechanism Under AC Electric Field: Part I - Torque and Current Density

Cited by 4 publications

References 5 publications

Electrorheological Rotating Disk Clutch Mechanism Under AC Electric Field: Part II - Efficiency Metrics

Electrorheological Rotating Disk Clutch Mechanism Under AC Electric Field: Part II - Efficiency Metrics

Smart fluids: current and future developments

Low-frequency dynamics of an electrorheological fluid in squeeze and shear mode. Part I: experiments

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