They used engine torque, brake torque, GPS measurement, and acceleration signal to estimate slip ratio
and longitudinal tire force.
It prevents the chances of skid while leaning or cornering by reducing the braking slip ratio
or the braking force.
The AB-2012, for the purpose of higher correlation to actual running conditions, enables tests by controlling friction force generated between the sample and abrasive wheel, in addition to the conventional slip ratio
The frequency of test data collection is 50Hz, and the data channels available are elapsed time for the test (ET), road speed (V), slip angle ([alpha]), inclination angle ([gamma]), slip ratio
([kappa]), normal load ([F.sub.z]), lateral force ([F.sub.y]), longitudinal force ([F.sub.x]), aligning moment ([M.sub.z]), overturning moment ([M.sub.x]), loaded radius (RL), effective radius (RE), wheel rotational speed (N), road surface temperature (RST), ambient room temperature (AMBTMP), and tire surface temperature (TST) .
[15.] Haiping, D., Weihua, L., and Yongjun, Z., "Tracking Control of Wheel Slip Ratio
with Velocity Estimation for Vehicle Anti-lock Braking System," 2015 27th Chinese Control and Decision Conference (CCDC).
presented a three-level control architecture of electronic stability control (ESC) , contains the yaw moment command decision(1st level), the distribution of desired longitudinal tire force based control allocation(2nd level) and the slip ratio
The solid blue curve in Fig.4 shows friction factor ([mu]) varying according to longitudinal slip ratio
([lambda]) on dry asphalt pavement.
Figure 3 shows that the attachment coefficient and slip ratio
of the car are the input signal x(i), which changes into after noise pollution.
German proposed a typical polynomial model to approximate the relationship between adhesion coefficient and slip ratio
of the tire-pavement interface using a simple polynomial function; however, this model cannot be applied when the slip ratio
is high .
The new 4-liter 250SS has 18 percent better slip ratio
than the current lower unit.
In order to improve the safety and dynamic performance of electric vehicles and prevent the wheel from locking or slipping when braking or accelerating, it is necessary to control the slip ratio
of each wheel in the stable region.
Wheel slip ratio
is an indispensable parameter of the research on vehicle braking.