In this research work, a new dynamic model of ER (electrorheological) damper was proposed considering compressibility of ER fluid and unsteady behaviour of ER fluid in the annular duct. After introducing the damper configuration, a quasi-static model of the damper was obtained based on the Bingham rheological law and the assumption of incompressibility of ER fluid. The dynamic model of the damper was then obtained by considering compressibility of ER fluid in upper and lower chambers, the unsteady behaviour of ER fluid flow in the annular duct and the thermal expansion of gas in the accumulator. A matrix form of the dynamic model was also derived. Comparative works between the simulated results obtained from the proposed dynamic model and the measured ones have shown that the proposed dynamic model can accurately express hysteresis and unsteady behaviour of the ER damper in different oscillation magnitudes and frequencies. On the basis of the proposed model, it has been shown that damping force of the ER damper is significantly affected by the compressibility of the ER fluid. It was found out that the smaller the ER fluid compressibility is the lesser the hysteresis of the ER damper is. Moreover, by considering different values of initial gas chamber pressure (P0) and gas volume (V0), it was shown that the hysteresis is not significantly affected by the initial pressure and gas volume of the accumulator. However, the former causes the damping force curve to be shifted vertically while small value of the latter can increase the damping force. The results presented in this work are quite self-explanatory justifying that the proposed analytical dynamic model can be effectively utilised for prediction of the hysteresis behaviour of ER or MR (magnetorheological) dampers without conduction of experiment.


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    Title :

    Damping force prediction of electrorheological fluid damper using an analytical dynamic model


    Contributors:
    Nguyen, Q.H. (author) / Choi, S.B. (author) / Lee, Y.S. (author) / Han, M.S. (author)

    Published in:

    Publication date :

    2012


    Size :

    21 Seiten, 12 Bilder, 26 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English





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