The vibration of SRMobtains less attention for in-wheel motor applications according to the present research works. In this paper,\nthe vertical component of SRM unbalanced radial force, which is named as SRMvertical force, is taken into account in suspension\nperformance for in-wheel motor driven electric vehicles (IWM-EV). The analysis results suggest that SRMvertical force has a great\neffect on suspension performance.The direct cause for this phenomenon is that SRM vertical force is directly exerted on the wheel,\nwhich will result in great variation in tyre dynamic load and the tyre will easily jump off the ground. Furthermore, the frequency\nof SRMvertical force is broad which covers the suspension resonance frequencies. So it is easy to arouse suspension resonance and\ngreatly damage suspension performance. Aiming at the new problem, FxLMS (filtered-X least mean square) controller is proposed\ntoimprove suspensionperformance.TheFxLMScontroller isbasedonactive suspension systemwhichcangenerate the controllable\nforce to suppress the vibration caused by SRM vertical force. The conclusion shows that it is effective to take advantage of active\nsuspensions to reduce the effect of SRM vertical force on suspension performance.
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