FxLMS Method for Suppressing In-Wheel Switched Reluctance Motor Vertical Force Based on Vehicle Active Suspension System

Abstract

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

Control of Automotive Semi-Active MR Suspensions for In-Wheel Electric Vehicles

“…For the in-wheel electric vehicle, a residual vertical force due to the electric motor can be considered for some tests. In this case, the residual vertical force that will be considered is shown in Figure 4 as in Reference [4]. Where it was estimated considering constant speed (60 km/h) and an SRM of 6 poles.…”

“…The modified QoV (ModQoV) shown in Figure 6b corresponds to an in-wheel electric vehicle considering the electric motor as part of the unsprung mass and the battery bank as part of the sprung mass as it was described in Section 2.2. In Figure 6c (ModQoVFv) the same masses than in Figure 6b are considered as well as, the unbalanced vertical force (F v ) given by the in-wheel electric motor, as mentioned in Reference [4]. In this case, the active suspension system is replaced by a semi-active one.…”

“…In Ma et al [3], the ADM and an LQR active suspension systems are considered for sprung mass vibration reduction but also a vertical linear force (F v ) provided by the switched reluctance (SR) in-wheel electric motor is taken into account for the analysis of the vertical dynamics. In Wang et al [4], an FxLMS (filtered-X-least mean square) is proposed for improving suspension performance with an active suspension system. In this case, the electric motor is considered as part of the unsprung mass, and the F v is also considered as an extra force adding vibration to the unsprung mass.…”

Hybrid Filtered‐x Adaptive Vibration Control with Internal Feedback and Online Identification

“…Fxlms algorithm has been used in active vibration control for its high computational efficiency and strong adaptability [31]. However, the algorithm also has some deficiencies.…”

Performance Enhancement of Suspension System of an Electric Vehicle Using Nature Inspired Meta-Heuristic Optimization Algorithm

“…In past decades, the suspension system of conventional vehicles is improved, but still suffers with the suspension nonlinearities, external disturbances and uncertainty. An active suspension control and optimization for electric vehicles are two crucial and effective methods to deal with these issues [6][7][8][9]. The electro-hydraulic, electromagnetic and regenerative active suspension systems stabilize the vehicle motion and provides comfortable ride with safety [10].…”