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Validation: Have you written a paper or something on msmac3D?

Posted: Mon Nov 16, 2015 3:44 pm
by MSI
Q: My brief review of msmac3D brings up the question: have you written a paper or something validating the 3D ?

A: Yes. First see a couple other threads on the topic:
  • We also have an upcoming paper in Collision Magazine:
    • A Review of the Development and Validation of Simulation Technology for Vehicular Accident Reconstruction
    We also expect to complete our formal publication of the validation of msmac3D soon:
    • Validation of msmac3D Simulation Model.
    ALSO, please note: The msmac2D program has been thoroughly validated and msmac3D runs in 2D mode and produces the same results. (msmac3D is an extension of msmac2D!)
    For example, see our 2003 paper:
    • SMAC2003: The Automatic Iteration of SMAC
      • In this paper we demonstrated that with automatic iteration/optimization we remove initial speed as an input for SMAC validation.
        Why?
        If you know the impact speed/answer then you can tweak the inputs until you get a match (as many other 'validation' papers do).
        In our 2003 paper we did not use the known impact speeds as an SMAC input!
        We started with approximate speeds from CRASH3/momentum solutions and then the program iterated/optimized to obtain a match of rest positions and damage and the results for the impact speed and deltaV (impact speed change) were within 5-10% for all the RICSAC full scale tests and other tests.
    As part of out publication of SMAC2016: Validation of msmac3D Simulation Model we will publish all inputs used to the web.
    • Why? One of the things we find missing with many other validation papers is that you do not know what inputs were used to produce the published results. Some 'validation' papers include partial input datasets (most do not) however none include the complete input datasets.
      All the inputs for validations should be published to allow verification of the results. Publishing all inputs used in validation studies is an integral part of preparing and completing a validation paper.
      The automatic iteration/optimization of msmac is an integral part of our msmac3D program and all users will receive it soon (or already) as part of our automatic updates and enhancements we provide to our McHenry Software msmac3D licensees
    Please consider adding our msmac3D to your accident reconstruction tool chest!
    Thank you for your interest in McHenry Software!
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Re: Validation: Have you written a paper or something on msmac3D?

Posted: Thu Jan 07, 2016 12:18 pm
by MSI
Dec 2015: Please also see the new McHenry Paper in Collision Magazine Vol 10, Issue 2
A Review of the Development and Validation of Simulation Technology for Vehicular Accident Reconstruction
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ABSTRACT
  • The principals at McHenry Software, Inc. (MSI), Raymond & Brian McHenry, have been active in the field of highway safety research for a combined period of over 90 years. In that time we have performed research for NHTSA, FHWA, NTSB, public and private research organizations and MSI internal development through which we have invented, developed and enhanced the state-of-the art of collision and rollover simulation programs and other reconstruction tools. The programs include CRASH, SMAC and HVOSM which are acronyms for accident simulation and collision reconstruction programs invented by Ray McHenry while at Calspan and on which Ray and Brian have extensively researched, developed and published. These programs form the foundation for many of the accident reconstruction and simulation tools in widespread use today.
    This paper includes a background on these programs including some of their unique validations and enhancements as well as more recent validation and correlation tests of the three-dimensional next generation combination of these programs: msmac3D. A discussion is included of what constitutes a proper demonstration of the validity of simulation and other reconstruction programs used for motor vehicle collisions, rollovers and other types of highway accidents.