World Scientific
Skip main navigation

Cookies Notification

We use cookies on this site to enhance your user experience. By continuing to browse the site, you consent to the use of our cookies. Learn More
×
Spring Sale: Get 35% off with a min. purchase of 2 titles. Use code SPRING35. Valid till 31st Mar 2025.

System Upgrade on Tue, May 28th, 2024 at 2am (EDT)

Existing users will be able to log into the site and access content. However, E-commerce and registration of new users may not be available for up to 12 hours.
For online purchase, please visit us again. Contact us at customercare@wspc.com for any enquiries.
No Access

UNIFIED DYNAMIC MODEL OF CONCENTRIC AND RADIAL ELECTRO-RHEOLOGICAL CLUTCHES INCLUDING HEAT TRANSFER

    https://doi.org/10.1142/9789812793607_0096Cited by:2 (Source: Crossref)
    Previous
    Next
    Abstract:

    This paper is an extension of the author's papers from the previous ERMR Conference in Yonezawa, Japan 1997, related only to a cylindrical electro-rheological clutch (ERC) without heat transfer.

    Input and output of an ERC (cylindrical or radial) are supposed to be connected with an electrodrive and a loading machine (brake) respectively. Driving moment is described by a nonlinear dynamic moment characteristics and loading moment is assumed to be harmonic in time with adjustable mean value, amplitude and frequency. Also friction moments on input and output shafts are taken into account, consisting of a dry and viscous components. Thus the relative angular velocity between ER clutch rotors is not an input parameter (as it used to be) but it emerges from the dynamic state of all complex system in question. This system is called a thermo-electro-rheological aggregate (TERA), because now (on the contrary to previous papers) also heat transfer in ERC via conduction and convection are taken into account. ER fluid is taken as usually as a Bingham plastic, but a gap in ERC is not necessarily narrow. More detailed list of assumptions is presented.

    Not only two types of ERC (cylindrical and radial with unified geometry), but also two arrangements of TERA for each type are considered, when outer rotor of ERC (casing) is connected with an electrodrive and inner rotor with a brake and vice versa.

    One starts to build up unified model of ERC from the very general Navier-Stokes equations in cylindrical coordinates applied for ERC. Afterwards nonlinear dimensional dynamic model of TERA is completed with equations of drive and motion. The model is of 7th order in time and contains 44 dimensional input parameters (their list is given).