THE SKIDDING OF VEHICLES - A DYNAMIC ANALYSIS

A 10-DEGREE-OF-FREEDOM DYNAMIC SYSTEM IS MODELED FOR A FOUR-WHEELED VEHICLE (INDEPENDENT AND PNEUMATIC TIRES). THE EMPIRICAL TIRE FORCES ARE MODELED BY EQUATIONS FROM THE LITERATURE. THE FOLLOWING VARIABLES CAN BE CALCULATED: TIRE DEFLECTIONS, SPRING AND SHOCK ABSORBER DEFLECTIONS, ROLL ANGLE, PITCH ANGLE, TIRE SLIP ANGLE, AND HORIZONTAL FORCES ON EACH TIRE. FROM THESE VARIABLES, THE MAXIMUM SURFACE RESISTANCE ON EACH TIRE CAN BE FOUND AS A FUNCTION OF TIME, AND THE EVENT OF SKIDDING CAN BE DETERMINED. THE DAMPING OF PNEUMATIC TIRES IS VERY IMPORTANT FOR THE STABILITY OF THE CAR IN SHARP CORNERING. THE CAR WHICH WAS SIMULATED WILL NOT SKID FOR SPEEDS LESS THAN 40 MPH WHEN THE TIRE-ROAD FRICTION IS 0.6 AND THE RADIUS OF CURVATURE IS 288 FEET. /AUTHOR/

• Supplemental Notes:
  • Progress RpT NBS CST-430, HS-800 130
• Corporate Authors:

  Department of Transportation

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Saibel, E
  • Tsao, M C
• Publication Date: 1968-11-6

Subject/Index Terms

• TRT Terms: Braking; Damping (Physics); Mathematical models; Motor vehicles; Pneumatic equipment; Skidding; Steering; Tires; Vehicle dynamics
• Old TRIS Terms: Cornering (Vehicle); Pneumatic tire
• Subject Areas: Highways; Operations and Traffic Management; Safety and Human Factors; Vehicles and Equipment;

Filing Info

• Accession Number: 00225687
• Record Type: Publication
• Source Agency: Traffic Systems Reviews & Abstracts
• Files: TRIS, USDOT
• Created Date: Jun 15 1970 12:00AM