EV traction control based on nonlinear observers considering longitudinal and lateral tire forces

DIEGO ALIGIA; GUILLERMO MAGALLÁN; CRISTIAN DE ANGELO

IEEE TRANSACTIONS ON INTELLIGENT TRANSPORTATION SYSTEMS

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC

Lugar: New York; Año: 2018

1524-9050

An observer-based traction control strategy for electricvehicles is proposed in this work. The proposed strategyconsiders the combined effects of lateral and longitudinal tractionforces, both for acceleration and regenerative braking, even incurved trajectories. Nonlinear reduced-order observers are designedfor estimating tire-road friction condition on each tractionwheel and vehicle lateral velocity, from which side-slip anglesare calculated. A detailed analysis of observers convergence isperformed and a method to know the quality of the estimatedvariables is also proposed. The proposed traction control strategyallows avoiding the traction wheels skidding during accelerationand braking both in straight trajectories and turning maneuvers.The performance of the proposal is verified through simulationon a complete vehicle model, under different situations and evenconsidering a different vehicle tire model.