Hybrid ABS with Electric Motor and Friction Brakes

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Date
2011
Authors
Diamantino Freitas
Ricardo de Castro
Rui Esteves Araujo
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Abstract
A new control method for the Anti-lock Braking System (ABS) of Electric and Hybrid Vehicles, propelled by in-wheel motors, is presented. In these types of propulsion systems, the braking torque applied to each wheel can be produced by two complementary actuators: friction brakes and in-wheel motors. Motivated by this braking redundancy, a (braking) torque allocation strategy was designed, taking into account the dynamics, energy efficiency and operation limits of each actuator. In addition, the wheel slip regulation is addressed by a robust controller, based on the sliding mode framework with conditional integrator. Simulation results, obtained with the CarSim simulator, demonstrate the effectiveness of the proposed method.
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