Hi Project Chrono,

tl;dr:

   - Can you help me make the strongest argument for the credibility of 
   using Project Chrono Vehicle in researching automotive control?
   - Do you have validation studies, or sources, for the various models in 
   the Project Chrono Vehicle database?
   - Can you port the vehicles implemented in NADS to Project Chrono? 


Dan Negrut recently gave a seminar at UC Davis, which inspired me to take 
another look at Project Chrono (I had come across it back in version 6 or 
so). I currently am researching front steering control of autonomous ground 
vehicles. The research standard (what appears most often in literature) 
appears to be to use CarSim for this. I have been told that the industry 
standard (what many OEMs use) is Adams/Car. 

In research, open-source projects are immensely useful because they enable 
free exchange and repeatability of research efforts. Unfortunately, CarSim 
is rather expensive ($6000/year or $14000 for an indefinite license). I 
have not looked into Adams/Car pricing. 

I would like to argue that Project Chrono Vehicle should become the new 
research standard for automotive control research. However, this requires 
arguing that Project Chrono's credibility is at or beyond that of CarSim's. 

I have studied multi-body dynamics a little bit (a Graduate class taught by 
Prof. Haug), and I am quite convinced of Project Chrono's credibility 
because of the validation studies you have online, the funding sources, the 
list of current and past users, the main developers, as well as the 
extensive capability of the codebase. Could you help me with making a 
strong argument for this?

When doing automotive control research, I understand that the gold standard 
is to have an experimentally validated model of an existing vehicle. 
However, in most literature using CarSim as a virtual vehicle, it appears 
that a generic vehicle (one that does not exist in real life but behaves 
like a realistic vehicle) is sufficient for the validation of control 
algorithms. I am only aware of the validation study comparing Project 
Chrono Vehicle to Adams/Car, and I am guessing that the vehicle model used 
in that study is the Generic Wheeled Vehicle 
<https://github.com/projectchrono/chrono/tree/main/data/vehicle/generic>. 
However, I can't be sure. I also am assuming that the validation study is 
quite old, but that it is still valid because I am assuming new releases 
make improvements. There are numerous other vehicle models in the 
repository, but I am not aware of their sources or if any of them are 
validated. If possible could you share what you can about the source and 
validation work (if any) of these vehicle models?

I have also considered implementing the vehicles developed for the National 
Advanced Driving Simulator (NADS) in Project Chrono. However, checking that 
the constructed model matches the original NADS implementation is mostly 
eyeballing (or guesswork) without the raw data from the NADS experiments.  
Since some of the Project Chrono developers have a connection to NADS (I 
think?) is it possible to get this data or port those models to Project 
Chrono?

Thank you,

Trevor 
PhD Candidate at UC Davis

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