Estimation of Tire Traction of an Electric Vehicle: Synergetic Observer

Similar to the most of modern vehicles, the electric ones are equipped with an anti-lock braking system (ABS), which should provide for the adaptability to rapidly changing conditions of a road surface and tire operation. The article presents the use of a synergetic observer to estimate the tire traction of an electric vehicle. The designed dynamic observer could be integrated in the structure of an electric vehicle adaptive control law. Both the observer and the adaptive control law use physically measurable variables of the braking system. The advantages of the proposed control law with synergetic observer against neural networks observers are (i) more simple structure; (ii) law's implementation does not require a complex neural network for parametrical and external disturbances calculation.