reduces, or even obviates, the need for the solid particle suspension. Introduction . Electrorheological fluids as a means of operating clutch mechanisms were. Smart Technology produces and sells Smart Materials like Electro Rheological Fluid and Piezo Actuators worldwide. The paper presents experimental results concerning the wear of heterogeneous electro-rheological (ER) fluids operating as working fluids in a complex clutch.

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At HKUST, researchers have employed nanotechnology to develop a novel type of ionic ER fluid that consists of white powder particles with an average diameter of 50 nanometers dispersed in silicone oil. Retrieved from ” https: Don’t have cputch account? It furthers the University’s objective of excellence in research, scholarship, and education by publishing worldwide.

To purchase short term access, please sign in to your Oxford Academic account above. If you originally registered with a username please use that to sign in. As a first step towards commercialisation, the research team is working with China Patent Investment to develop potential applications for the ER fluids. The existence of a solution of optimal control problem is proved and necessary optimality conditions are established.

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Regularization of the semilinear sideways heat equation. Sign in via your Institution Sign in.

Such fluids and their unique properties have been recognised for more than 50 years, but practical applications had yet to be developed because, until now, researchers had been unable to break the 20 kPa barrier. The effect of inclination on the development of slugging in channel flow.

Elsctrorheological control of electrorheological clutch described by nonlinear parabolic equation with nonlocal boundary conditions.

New ER fluids build better clutches

You do not currently have access to this article. A problem on optimal control of acceleration or braking of the driven rotor is formulated and studied.

Don’t already have an Oxford Academic account? When an external electric field is applied, they can be changed within a few milliseconds a few thousandths of a second into a solid state but revert to electrkrheological instantly when the current goes off. This page was last edited on 16 Marchat Most users should sign in with their email address. The general problem on dynamics of the electrorheological clutch is formulated and studied.

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The ER fluid is used as the coupling between the input and the output drive and driven members. Functions of time of the angular velocity of the driving rotor and of the voltages are considered to be controls. Researchers have used the fluids to create a new type of clutch.

Electrorheological clutch – Wikipedia

Abstract The general problem on dynamics of the electrorheological clutch is formulated and studied. Dynamics of electrorheological clutch and a problem for non-linear parabolic equation with non-local boundary conditions W.

The torque function clutxh computed upon integrating the shear stresses non-linear functions of derivatives of the velocity over the surface of the driven rotor. The velocity of the fluid is specified on the surface of the driving rotor.

The clutch acts as a power amplifier and the effect is fast of the order of eelectrorheological and reversible. From Wikipedia, the free encyclopedia. The operation of the electrorheological clutch is simulated by a nonlinear parabolic equation which describes the motion of electrorheological fluid in the gap between the driving and driven rotors.