Chaotic vibration analysis of vehicle suspension with magneto-rheological damper

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Journal of Vibration and Shock ›› 2015, Vol. 34 ›› Issue (24) : 128-134.

HUANG Miao-yu, WANG En-rong, MIN Fu-hong

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Abstract

The dynamic equation of 2-DOF quarter-car magneto-rheological suspension is established from the hysteretic force-velocity (F-v) model of magneto-rheological damper. The bifurcation dynamics affected by frequency and amplitude of harmonic excitation, are deeply studied, through phase diagram, Poincaré map and power spectrum. Moreover, according to the principle of semi-active control, the sensitivity of control current is further investigated in the low-bandwidth and middle-bandwidth. The results show that the dynamic state of MR suspension system is easily affected by the road excitation frequency and amplitude, and less sensitive to the control current of MRD, which provides a useful theoretical guidance for consummating the synthesis of MR semi-active suspension system controller to effectively suppress its chaotic vibration.

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magneto-rheological damper / vehicle suspension / chaotic vibration / semi-active control

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HUANG Miao-yu, WANG En-rong, MIN Fu-hong. Chaotic vibration analysis of vehicle suspension with magneto-rheological damper[J]. Journal of Vibration and Shock, 2015, 34(24): 128-134

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