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The objective of this study is to develop a dynamic model utilizing the transfer function approach to depict the correlation between current and pressure in a magnetorheological (MR) device. A transfe...r function-based dynamic model is employed due to its ability to replicate the dynamic response of pressure drop caused by current fluctuations, while also ensuring simplicity in the design of automated control systems. This study also utilized the linear black-box approach to forecast the dynamic behavior of the current-pressure characteristics. The model was derived using empirical data collected from an annular MR valve. The experimental data were examined by fitting them to a series of transfer function structures. The poles and zeros coefficients in each transfer function were calculated using the invariant variable regression approach and the Levenberg-Marquardt (LM) iteration, employing the system identification tools in MATLAB. The result of this technique produced a transfer function model of the 14th order, which is referred to as TF14. The TF14 model closely matches the experimental data, with a mean absolute percentage error of 12.64%. The results offer useful insights into the dynamic correlation between current and pressure in MR devices and their modeling technique.show more
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p2284-2295