In order to improve the curving performance of\nthe conventional wheelset in sharp curves and resolve the\nsteering ability problem of the independently rotating wheel\nin large radius curves and tangent lines, a differential coupling\nwheelset (DCW) was developed in this work. The\nDCW was composed of two independently rotating wheels\n(IRWs) coupled by a clutch-type limited slip differential.\nThe differential contains a static pre-stress clutch, which\ncould lock both sides of IRWs of the DCW to ensure a good\nsteering performance in curves with large radius and tangent\ntrack. In contrast, the clutch could unlock the two IRWs of\nthe DCW in a sharp curve to endue it with the characteristic\nof an IRW, so that the vehicles can go through the tight curve\nsmoothly. To study the dynamic performance of the DCW, a\nmulti-body dynamic model of single bogie with DCWs was\nestablished. The self-centering capability, hunting stability,\nand self-steering performance on a curved track were analyzed\nand then compared with those of the conventional\nwheelset and IRW. Finally, the effect of coupling parameters\nof the DCW on the dynamic performance was investigated.
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