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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Nonlocal nonlinear boundary condition is given on a part of the boundary, which corresponds to the driven rotor. In the case of braking, the energy production is maximized.
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Dynamics of electrorheological clutch and a problem for non-linear parabolic equation with non-local boundary conditions W. Abstract Clhtch general problem on dynamics of the electrorheological clutch is formulated and studied. Approximate problem is formulated in a form of a problem with a delay. The clutch acts as a power amplifier and the effect is fast of the order of milliseconds and reversible.
Most users should sign in with their clutcg address. Email alerts New issue alert. As a first step towards commercialisation, the research team is working with China Patent Investment to develop potential applications for the ER fluids. 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.
You could not be signed in. Optimal control of electrorheological clutch described by nonlinear parabolic equation with nonlocal boundary conditions. Related articles in Web of Science Google Scholar. 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 ER fluid is used as the coupling between the input and the output drive and driven members. Don’t already have an Oxford Academic account? See also [ edit ] Electromagnetic clutch External links [ edit ] HowStuffWorks has a detailed explanation of the working of a clutch. At the flick of a switch, the ER suspension, which has the fluidity of milk, becomes sticky and solidifies into a material as hard as plastic within a few milliseconds.
Oxford University Press is a department of the University of Oxford. Regularization of the semilinear sideways heat equation. Sign in via your Institution Sign in. Citing articles via Web of Science 3.
Smart Technology Limited – Electro-Rheological (ER) fluid
Litvinov; Dynamics of electrorheological clutch and a problem for non-linear parabolic equation with non-local boundary conditions, IMA Journal of Applied MathematicsVolume 73, Issue 4, 1 AugustPages —, https: Latest Most Read Most Cited Diagnostics of wear thermoelastic instability based on sliding contact parameter monitoring.
Sign In or Create an Account. The velocity on the surface of the driven rotor is defined as an integral of the torque function over time t from zero to t. Trapped modes of the Helmholtz equation in infinite waveguides with wall indentations and circular obstacles.
In the case that the clutch acts as an accelerator, the energy consumed in the acceleration of the driven rotor is minimized under the restriction that at some instant, the angular velocity and the acceleration of the driven electrorheplogical are localized within given regions.
In this case, the velocity of the driving rotor is prescribed on one part of the boundary. Automatic transmission Chain drive Clutch Constant-velocity joint Continuously variable transmission Coupling Differential Direct-shift gearbox Drive shaft Dual-clutch transmission Drive wheel Electrohydraulic manual transmission Electrorheological clutch Epicyclic gearing Fluid coupling Friction electrorheoloogical Gear stick Giubo Hotchkiss drive Limited-slip differential Locking differential Manual transmission Manumatic Parking pawl Park by wire Preselector gearbox Semi-automatic transmission Shift by wire Torque converter Transaxle Transmission control unit Universal joint.
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Researchers have used the fluids to create a new type of clutch. Receive exclusive offers and updates from Oxford Academic. Purchase Subscription prices and ordering Short-term Access 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. The electromagnetic scattering problem by a cylindrical doubly connected domain at oblique incidence: Retrieved from ” https: The torque function is computed upon integrating the shear stresses non-linear functions of derivatives of the velocity over the surface of the driven rotor.
The effect of inclination on the development of slugging in channel flow. From Wikipedia, the free encyclopedia. A problem on optimal control of acceleration or braking of the driven rotor is formulated and studied. It is proved the existence and the uniqueness of the solution of the initial and approximate problems and the convergence of the solutions of the approximate problem to the solution of the initial problem as elechrorheological parameter of delay tends to zero.
Scientists at the Hong Kong University of Science and Technology have developed a novel clutch based on a new class of electrorheological fluids. Views Read Edit Electrorheo,ogical history. The problem amounts to finding out a function of velocity of the electrorheological fluid which satisfies the motion equation non-linear parabolic equation and mixed non-classical boundary conditions.