HVE White Papers Engineering Dynamics Simulation Model of
Automobile Collisions EDSMAC is an analysis of single- or two-
vehicle accidents, including collision. Based on the SMAC model
originally developed at Calspan, EDSMAC also includes numerous
enhancements developed by Engineering Dynamics Corporation.
EDSMAC may be used to predict and visualize vehicle response
before, during and after impact. Accident investigators can use
EDSMAC to determine impact velocity and delta-V. The procedure
involves an initial estimate of the conditions of impact made by
the user or supplied by an EDCRASH reconstruction; this is
followed by a series of user-defined adjustments to the initial
conditions until the final results duplicate the physical
evidence (rest positions and vehicle damage) found at the
accident site. EDSMAC computes collision and tire forces at
user-specified timesteps. The program then displays the results
visually on a scaled crash site diagram and numerically in the
form of vehicle kinematics (position/v