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Safety and Lateral Dynamics Improvement of a Race Car Using Active Rear Wing Control
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 2, 2019 by SAE International in United States
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As the forward speed of a car increases, the safety of the vehicle and the driver becomes a more significant concern. Active aerodynamic control can effectively enhance the lateral stability of high speed vehicles over tight cornering maneuvers. A split rear wing has been proposed. By means of manipulating the attack angles for the right and/or left parts of the split rear wing, a favorable yaw moment may be achieved to ensure the lateral stability of the vehicle. However, active control of the split rear wing has not been adequately explored. This paper proposes a novel active split rear wing, which can improve the lateral stability over tight cornering maneuvers, and will not degrade the longitudinal dynamics of the vehicle. A Linear Quadratic Regulator (LQR) based controller for the active split rear wing is designed using a linear vehicle model. In order to examine the performance of the active split rear wing, Numerical simulation is carried out using the LQR based controller and a yaw-plane vehicle model designed in MATLAB. The effectiveness of the proposed active split rear wing is demonstrated by the results derived from the numerical simulation.
CitationHammad, M., Qureshi, K., and He, Y., "Safety and Lateral Dynamics Improvement of a Race Car Using Active Rear Wing Control," SAE Technical Paper 2019-01-0643, 2019, https://doi.org/10.4271/2019-01-0643.
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