SAE J2400 pdf download
SAE J2400 pdf download.Human Factors in Forward Collision Warning Systems: Operating Characteristics and User Interface Requirements.
Forward Colision Warning (FCW) systems are onboard systems litended to provide alerts to assist drivers in avoiding striking the rear end of another moving or stationary motorized vehicle. This SAE Information Report describes elements for a FCW operator interface, as well as requwemenls and test methods for systems capable of warning drivers of rear-end colbsions.
This information report applies to Original equipment and atlermarket FCW systems for passenger vehicles including cars, light Lrucks, and vans. This report does fbI apply tO heavy truCliS. Furthermore, this document does not address integration issues associated with adaptive cruise control (ACC). and consequently, aspects of the docisi’ient could be inappropriate for an ACC system integrated with aFCW system.
2. Relerences
2.1 ApplIcable Publications—The following publications form a part of the specification to the extent specified herein. Unless otherwise indicated the latest revision of SAE publications shall apply.
2.1.1 OTHER PU&JCAUONS
American Association of State Highway and Transportation Officials IAASHTOk200I). A policy on geometric design of highways and streets.
Balbale and R. Kiofer (2001). Driver preference rankings of various collision avoidance related symbol. Presented at ISO TC22/SCI3/WGS (Road Vehicles-Symbols for Controls. Indicators and Telltales) meeting in Dresden. Germany.
Gdbert, R.K., Zoratti. R., Becker, 6.. Brunibaugh. T., Chaplin, M.. Harrison, M., and K. Goridoly (1997). Characterization and evaluation of a prototype forward-looking automotive radar: Final Report, Office of Crash Avoidance Research, National Highway Transportation Safety Adrmnistration. Washlnon, DC, Report No. 654100-9-F.
ISO TC 2041WG141N144.1. Road vehicles — Forward Vehicle Collision Warrsng System — Performance requirements and test procedures. IDratt only, 1999-07-191
Kieter, R.. LeBlanc, D.. Palmer. M, Salinger. ,L, Deering, B., and M. Shulman (1999). Development and validation of functional definitions and evaluation procedures for colision wamingfavoidance systems. DOT HS 808 964. Office of Crash Avoidance Research. National Highway Transportation Safety Administration. Washington. DC.
LeBtanc. D.. Kieter. A.. Deering, B.. Shulman. M.. Palmer. M,. and Salinger. J. (2001). Forw&rd colbsion warning: preliminary requirements for crash alert timing. Society of Automotive Engineers *2001-01- 0462.
Scolnik, M. (1970). Radar Handbook. McGraw Hill.
U.S. Department of Transportation. Federal Highway Administration (2001). Manual on Uniform Traffic Control Devices (MUTCD).
3. Definitiones—For the purpose of this information report (IR). the following definitions apply. Some of those definitions have been adopted from ISOfTC2O41WG14IN144, and others are specific to thés SAE IR.
3.1 Forward Collision Warning (FCW) Systems—Systems intended to provide alerts to assist drivers in avoiding striking the rear-end of another moving or stationary vehicle, and to help mitigate the wnpact of rear-end crashes,
3.2 Active Mode—FCW system is receiving power and is monitoring the area ahead to detect hazards.
3.3 Actual Deceleration Parameter (ADP)—The assumed deceleration of the host vehicle (expressed in ga) in response to an alert, used in comouting the latest aIowate FCW alert onset for a given kinematic situation.
3.4 Alert Zone-The alert zone defines which vehicles in front of the siiect vehicle are alowed to trigger FCW alerts. For an alert to be allowed, some portion of the target vehde must lie within the alert zone at the onset of the alert, or be predicted to be within the alert zone at a time after the onset of the alert.
3.5 af,—Actual acceleration (neg. for braking) of the LV at the onset of an observed FCW alert.
3.6 asv—ACtuaI acceleration (negative for braking) of the subject vehicle at the onset of an observed FCW alert.
3.7 Brake System Lag—Time interval between Mien the brake pedal is pressed and the vehide begins to decelerate.
3.8 TIme Gap—The time require (at current speeds) for the front bumper of the host vehicle to reach the current position of the rear bumper of the lead vehicle.
3.9 Host Vehicle—The FCW-ectuipped vehicle under consideration (also called subject vehide).
3.10 ImmInent Collision Warning—A warning to be given to the SV driver In situations which potentially require an immediate corrective aclion by the driver.
3.11 Kinematic Situation—A particular scenario rivolving a subØct vehicle end lead vehicle, specifying values for their speeds, accelerations, and lateral and longitudinal placements at a given instant.
3.12 Lead Vehicle (LV)—A vehicle In the path of the subject vehicle which presents a potential threat of collision (also has been referred as the principal other vehicle).
3.13 Non-functioning—The status of a FCW system that has been manually turned off by the dnver.
3.14 RequIred Deceleration Parameter (RDP)—The assumed deceleration of the host vehicle (expressed in g’s) n response to an alert, used in comouting both the recommended timing of an FCW alert onset and the earhest allowable FCW alert onset for a given kinematic situation.
3.15 Standby Mode—The system is receiving power, but the sensors and FCW system is not activated.
