DEVELOPMENT OF REAL-TIME ESTIMATOR ON MAXIMUM AND
PRESENT TIRE GRIP FOR DIRECT YAW MOMENT CONTROL |
Jae Yong Park 1,2, Sungsoo Na 1 |
1Korea University 2Hyundai Motors Company |
|
|
|
|
ABSTRACT |
This study proposes a method for estimating the maximum and present tire grips of a driving vehicle in real
time. Direct yaw moment control (DYC) based on detecting wheel slip does not significantly affect general driving due to
wheel slip at medium and low speeds. However, during the high-speed driving of a high-performance vehicle or driving
within a racing track, frequent wheel slips have a significant adverse effect on the driving performance. This is because a tire
that loses grip cannot generate additional driving and steering forces. Therefore, if the tire operating force of each wheel can
be estimated in real time and the tire friction saturation limit can be precisely calculated, the driving performance can be
significantly improved compared to control for wheel slip regulation. In this study, a precise tire friction limit model was
developed to improve the limit driving handling performance through DYC, and the reliability of the estimation of the present
tire grip was verified through actual vehicle measurements. |
Key Words:
Friction saturation limit, Wheel slip inhibition control, Direct yaw moment control (DYC), Torquevectoring
(TV), Wheel position sensor, Wheel force transducer |
|