Abstract
This work proposes a new method for dynamic modeling of an electrorheological (ER)damper using a lumped parameter method. After describing the configuration andoperating principle of the ER damper, quasi-static modeling of the damper isconducted on the basis of the Bingham model of ER fluid. Subsequently, the lumpedparameter models of ER fluid flows in the damper are established and the integratedlumped model of the whole damper system is obtained by taking into account thedynamic motions of the annular duct, upper chamber, lower chamber and connectingpipe. In order to demonstrate the effectiveness of the proposed dynamic model, acomparative work between the simulation and the experiment is undertaken. This isperformed under various piston motions with different excitation magnitudesand frequencies. In addition, the effect of ER fluid compressibility and initialpressure in the accumulator on the hysteresis of the ER damper is investigated.
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