Development of the Shaking Vibration Control for Electric Vehicles

This paper describes a shaking vibration suppression approach for electric vehicles, which provides quick and smooth acceleration response. The vehicle that is driven by an electric motor can provide a quick acceleration response that depends on the characteristics of the motor's torque response. However, at the same time, the fast acceleration rate of the motor torque causes an uncomfortable shaking vibration that originates from the twisting torque of the drive shaft. To achieve a balance between the vehicle accelerating performance and the comfortable ride, a new shaking vibration control method is proposed. The proposed control system is composed of a feed-forward compensator with an inverse filter and a feedback compensator by applying a perfect zeroing method. The feed-forward filter can suppress a shaking vibration induced by motor output torque, and the feedback compensator suppresses a shaking vibration caused by a disturbance input such as a model error or a disturbance torque input. Driving tests were conducted with an experimental fuel cell vehicle operated by an electric motor control. According to the driving test results, it has been confirmed that quick acceleration response was obtained without any shaking vibration, and the usefulness of the proposed control approach is confirmed.