Outline of Slides

1
Outline of Slides

• Slide 1 CarSim Setup
• Shows screenshots of the custom road profile
  being created in CarSim as well as the built-in
  surface animator
• Slide 2 Determining the Simulation Parameters
• Based upon available probability data, the chart
  on this slide shows the probability of the chosen
  vehicle classes, speeds, and encroachment angles
  to be simulated
• Slide 3 Defining Vehicle Classes
• Shows a table of vehicle parameters used to
  define each vehicle class. These parameters
  (along with an in depth survey of vehicles on the
  market) were used to calculate an average bumper
  height with respect to vehicle CG for each
  vehicle class
• Slide 4 Simulation Screenshots
• Shows screenshots from the surface animator of a
  simulation on a 6H1V median slope. The driver
  input shown here was with light braking (5 MPa of
  brake pressure) and steering the vehicle back
  into the original travel lane

2
Outline of Slides

• Slide 5 Simulation Results
• Shows various plots of the output from the
  simulation run shown in Slide 4. The final plot
  shows black rectangles (which represent the
  vehicles front bumper) as the vehicle starts in
  the travel lane, crashes down the median and
  eventually ends up back in the original travel
  lane
• Slide 6 Simulation Results
• Shows the results of all small SUV simulations on
  a 6H1V median. The bumper height was recorded as
  a function of lateral offset from the original
  travel lanes shoulder.
• Attached Movies
• Have also attached two movies. One animation was
  taken directly from CarSim to see the test shown
  in Slides 4 and 5. The other movie shows the
  bumper trace in action as the vehicle crashes
  down the median. It is overlayed on top of the
  plot in Slide 5.

3
CarSim Setup

• Construction of 3D median profile
• Surface animation of one trajectory on a 6H1V
  slope

4
Determining Simulation Parameters

• As the end results of this study are going to be
  weighted based upon their probability of actually
  occurring, the vehicle classes, speeds and
  encroachment angles simulated were chosen based
  upon available probability data from the RSAP
  Engineers Manual and the 2001 National Household
  Travel Survey.

5
Defining Vehicle Classes
Parameters used to define each vehicle class
6
Simulation Screenshots
7
Simulation Results
8
Simulation Results

• The bumper height was recorded as a function of
  lateral distance from the original travel lane
  shoulder. This was done to represent the height
  at which the bumper would hit a hypothetical
  barrier, if the barrier was placed at this
  lateral offset
• Results shown for all simulated speeds and
  encroachment angles for a small SUV on a 6H1V
  median slope