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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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. Views Read Edit View history. Clutches Automotive transmission technologies. The effect of inclination on the development of slugging in channel flow. Scientists at the Hong Kong University of Science and Technology have developed a novel clutch based on a new class of electrorheological fluids.

An electrorheological clutch ER clutch comprises drive and driven members, generally parallel to each other, that can be selectively engaged by the application of electrorheoological voltage to an electrorheological ER fluid.

The general problem on dynamics of the electrorheological clutch is formulated and studied.

You eectrorheological not be signed in. By using this site, you agree to the Terms of Use and Privacy Policy. Nonlocal nonlinear boundary condition is given on a part of the boundary, which corresponds to the driven rotor.

Optimal control of electrorheological clutch described by nonlinear parabolic equation with nonlocal boundary conditions. Sign In Forgot password? In this case, the velocity of the driving rotor is prescribed on one part of the boundary.


Ahmad Hosseini-Sianaki – Google Scholar Citations

Related articles in Web of Science Google Scholar. The ER fluid is used as the coupling between the input and the output drive and driven members. Approximate problem is formulated in a form of a problem with a delay. Retrieved from ” https: In the case of braking, the energy production is maximized. Most users should sign in with their email address. If you originally registered with a username please use that to sign in.

Dynamics of electrorheological clutch and a problem for non-linear parabolic equation with non-local boundary conditions W. Sign in via your Institution Sign in. The electromagnetic scattering problem by a cylindrical doubly connected domain at oblique incidence: The velocity of the fluid is specified on the surface elrctrorheological the driving rotor.

Electrorheological clutch for robotics applications: validation of mathematical

Electric motor Hybrid vehicle drivetrain Electric generator Alternator. 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 rotor are localized electorheological given regions.

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The fluids are capable of exhibiting a high yield stress the strength of the materials in solid state of kPa when electrically charged, ten times stronger than the previously achievable ER solid strength. The properties of ER fluids make them ideal materials to transfer energy and control motion electronically, particularly in the automotive industry.

Functions of time of the angular velocity of the driving rotor and of the voltages are considered to be controls. Trapped electrorheokogical of the Helmholtz equation in infinite waveguides with wall indentations and circular obstacles. 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: This article is also available for rental through DeepDyve.


A problem on optimal control of acceleration or braking of the driven rotor is formulated and studied. 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 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. At the flick of a switch, the ER suspension, which has the fluidity of electrorhellogical, becomes sticky and solidifies into a material as hard electrorueological plastic within a few milliseconds.

Don’t have an clutdh Citing articles via Web of Science 3.

Electrorheological clutch

It is proved the existence and the uniqueness of the solution of the initial and approximate problems and the convergence of the solutions electrorheologica the approximate problem to the solution of the initial problem as the parameter of delay tends to zero. Researchers have used the fluids to create a new type of clutch. 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.