PC-CRASH Multi-body option IS the ATB program!

[MSI]

I don't know why PC-CRASH pretend their 3D "multi-body" model is something independently created when in reality it is the ATB program.

Quick comparison of the ATB program vs pc-crash Multi-body simulation
first note that ATB is:

ATB general purpose lumped mass program.png (29.78 KiB) Viewed 8308 times

And here is a comparison of the models, look familiar?

ATB v pc-crash multibody.png (187.43 KiB) Viewed 8308 times

Here are the references pc-crash provides about their multi-body option:

multibody references all.png (154.52 KiB) Viewed 7993 times

• These are advanced classroom textbooks which do not address the the coding for use as a simulation program as if it might be easy work!
  • See What is ATB where we present and discuss the brilliant pioneering work by Dr. John Fleck which included extremely efficient integration routines for economical execution of the program and the addition of many extensions and refinements to move the mathematical model from 2 dimensions to 3 dimensions
  • For some reason they pretend it is NOT ATB. IT IS ATB! NOT applicable to individual crash reconstruction
    These references are engineering series type references and not about any specific way pc-crash implemented theory and analysis into a working multi body simulation code. And the transformation of scientific equations and theories into computer code and integration routines is the brilliance of the work of Dr. John T. Fleck!
    
    Why won't pc-crash acknowledge the pioneering contribution of Calspan & the late Dr John Fleck in the creation of the ATB code and the use by pc-crash of ATB code as their "multi body" option??

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FYI Virtual CRASH DOES admit to using ATB:
(the following was copied from this other forum topic on ATB/Occupant simulation in general)

• They use a version of the ATB for their pedestrian and passenger simulations
  From the Virtual Crash Ver 3/4/5 User's Guide:
  • p 345: "Most biomechanics-type simulation tools, such as ATB, will treat the occupant model as essentially a flaccid body, with no active muscle control – Virtual CRASH is no different"
  • "Virtual CRASH includes the ability to simulate an “optimized” human model that will hold its pre-impact pose until it comes into contact with a surface within the environment, at which time the pose is “released” and the human model is treated as a flaccid body (the user can control joint rigidity)."
  • p621 "As in other biomechanics-type simulation programs, such as Articulated Total Body(27), the Virtual CRASH human model is a multi-ellipsoid system connected by joints."
  • reference 27: "See SAE 950131"
    • which is SAE Paper "Using ATB in collision reconstruction" by Wesley Grimes, author of GATB which is ATB working in the HVE environment. see GATB above
    • NOTE: to simply Hold the pre-positioned ATB model until arbitrarily released by user choice is not a creation of a 'human model' and it does not improve or change the lack of fidelity of ATB for individual case reconstructions.
      It merely provides a way to try to hide the fact that ATB does NOT model active human muscles or responses it is as they say ATB is "essentially a flaccid body, with no active muscle control"