Control strategy for ISD suspension considering dynamic vibration absorber of wheel motor
2022-01-0332
03/29/2022
- Event
- Content
- Vehicles driven by in-wheel motors have the advantages of compact structure and high transmission efficiency, which is one of the most ideal energy-saving, environmentally friendly and safe driving forms in the future. However, the addition of the in-wheel motor significantly increases the unsprung mass of the vehicle, resulting in a decrease in the mass ratio of the vehicle body to the wheel, which will deteriorate the ride comfort and safety of the vehicle. To improve the vibration performance of in-wheel motor vehicles, a semi-active inerter-spring-damping(ISD) suspension based on in-wheel motor vibration absorption is proposed in this paper. Firstly, mounting elements are applied to the wheel to provide elastic isolation between the in-wheel motors and the tyre, which converts the in-wheel motor mass into a vibration absorber to suppress the high-frequency vibration of the unsprung mass. Secondly, an ISD suspension is used to improve the low and mid-frequency characteristics of the vehicle body. Based on an adjustable inertial container, a semi-active control strategy of the variable ISD suspension using the LQG controller is proposed. Compared with the passive ISD suspension and passive suspension, the semi-active ISD suspension based on wheel motor absorber proposed can significantly reduce the low-frequency vibration of the body, and also effectively suppress the dynamic load of the wheels which improved the grounding performance of tires. It is concluded that the proposed semi-active suspension can effectively improve the ride comfort of the vehicle driven by in-wheel motors.
- Citation
- Zhang, K., Wu, J., and Zhang, Y., "Control strategy for ISD suspension considering dynamic vibration absorber of wheel motor," SAE Technical Paper 2022-01-0332, 2022, .