We have developed a system for automatic deceleration upon entering curves to prevent collisions on tight curves on high-ways. The navigation system is used to determine safe speed negotiating the curve, defined as a speed that will keep lateral acceleration within a settled value. The navigation system sends the curve radius to a controller, which calculates the safe speed for the curve. The controller then sends the speed command to the ACC system, which adjusts the vehicle speed. One of the important features in this system is the estimation of the vehicle position, in terms of its distance from the curve entrance. Navigation systems have a certain amount of dispersion in positional accuracy. A front camera is used in our system to decrease this dispersion. This camera detects lane markers (white lines, raised pavement markers, etc.) using our line recognition technologies1). The change in the curve radius is detected by the lateral displacement of the markers to estimate the position of the curve entrance. The proposed technique in this estimation is to use a transient curve model. The lateral displacement of the markers changes according to the clothoid function in the curve entrance. By curve-fitting the data from the lateral displacement of the markers, which was obtained by the front camera, and by comparing the data with the clothoid function, the precise position of the curve entrance can be estimated. The developed system has been installed in a prototype vehicle. Safe deceleration upon entering curves has been demonstrated successfully. The demonstration video will be shown in the presentation.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Automatic Curve Deceleration System Using Enhanced ACC with Navigation System


    Additional title:

    Sae International Journal of Passenger Cars- Electronic and Electrical Systems
    Sae Int. J. Passeng. Cars – Electron. Electr. Syst


    Contributors:

    Conference:

    SAE World Congress & Exhibition ; 2008



    Publication date :

    2008-04-14


    Size :

    6 pages




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    2008-01-0922 Automatic Curve Deceleration System Using Enhanced ACC with Navigation System

    Sakamoto, H. / Imai, M. / Tsuchiya, K. et al. | British Library Conference Proceedings | 2008


    Automatic curve detection system using enhanced ACC with navigation system

    Sakamoto,H. / Imai,M. / Tsuchiya,K. et al. | Automotive engineering | 2008


    Auto deceleration control navigation system

    YOON SANG WON / KIM KOUNG JEA / KIM DONG MIN et al. | European Patent Office | 2017

    Free access

    Automatic deceleration control system

    JOHNSON SCOTT E / ADEB ADAM J | European Patent Office | 2023

    Free access

    AUTOMATIC DECELERATION SYSTEM OF CONSTRUCTION VEHICLE

    KANG CHEOL YONG / KANG MIN JUN / KIM BYUNG HOON et al. | European Patent Office | 2019

    Free access