In recent years, the development of electric vehicles has boosted the autonomous vehicle technology. The electric vehicle can be controlled with precision and ease by manipulating the input current to the motor. This feature is highly valued in autonomous vehicle since precise control is required during critical maneuvering. However, heavy load tends to affect the performance of the electric vehicle. During a sharp turn or cornering the vehicle tends to experience load transfer. This causes the vehicle to experience extra load on one side of the vehicle compared to the other. Addition of load on either side will further increase the stress on the motor causing the vehicle to experience instability. This instability can be an unidentified external disturbance to the autonomous vehicle control. Thus, this paper is designed to uncover the effect of unbalanced overloading on steering of electric vehicle during tight cornering. Firstly, a simulation model on two in-wheel electric vehicle is developed. The analysis of the electric vehicle steering is conducted using the developed simulation model. Based on the result, increasing load on the side corresponding to the direction of the lateral motion causes the vehicle to experience oversteer. For instance, as the load on the right side of the vehicle is increased by 60%, the vehicle loses control and start skidding. On the other hand, increasing load on the left side causes the vehicle to experience understeer. This can affect the reliability of the controller in an autonomous vehicle since this external disturbance can be large at higher velocity.
An Investigation on the Effect of Unbalanced Overloading on Compact Electric Vehicle Steering During Tight Cornering
Lect.Notes Mechanical Engineering
2021-08-05
10 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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