VEHICLE VELOCITY ESTIMATION USING EFFECTIVE INERTIA FOR AN IN-WHEEL ELECTRIC VEHICLE

KO, S. Y.; KO, J. W.; LEE, S. M.; CHEON, J. S.; KIM, H. S.

doi:2014.15.5.815

International Journal of Automotive Technology > Volume 15(5); 2014 > Article

Fuel Cell, Hybrid and Electrical Vehicle

International Journal of Automotive Technology 2014;15(5): 815-821.
doi: https://doi.org/10.1007/s12239-014-0085-8

VEHICLE VELOCITY ESTIMATION USING EFFECTIVE INERTIA FOR AN IN-WHEEL ELECTRIC VEHICLE

S. Y. KO¹, J. W. KO², S. M. LEE³, J. S. CHEON⁴, H. S. KIM¹

¹Sungkyunkwan university
²SKKU
³Hyundai Mobis
⁴MOBIS

ABSTRACT

In this study, a vehicle velocity estimation algorithm for an in-wheel electric vehicle is proposed. This algorithm estimates the vehicle velocity using the concept of effective inertia, which is based on the motor torque, the angular velocity of each wheel and vehicle acceleration. Effective inertia is a virtual mass that changes according to the state of a vehicle, such as acceleration, deceleration, turning or driving on a low friction road. The performance of the proposed vehicle velocity estimation algorithm was verified in various conditions that included straight driving, circle driving and low friction road driving using the in-wheel electric vehicle that was equipped with an in-wheel system in each of its rear wheels.

Key Words: Vehicle velocity, Effective inertia, In-wheel