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MMM hmm - milliken's moment method
#1
Posted 09 December 2011 - 04:29
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#2
Posted 19 December 2011 - 15:23
Anybody using this? If so do you roll your own software or use Milliken's?
I used MMM for comparison of different driveline's based on a single platform. Validation with a 2WD and AWD prototype gave very good results up too 1g lat acc! I made a few matlab m-files for the calculations. Im not quite sure about the extent of milikens software, but the diagram contains lots of information and I thought it was very usefull.
#3
Posted 20 December 2011 - 01:38
Thanks. I know Ben has used it and one other tire engineer, I think they both wrote their own solvers.I used MMM for comparison of different driveline's based on a single platform. Validation with a 2WD and AWD prototype gave very good results up too 1g lat acc! I made a few matlab m-files for the calculations. Im not quite sure about the extent of milikens software, but the diagram contains lots of information and I thought it was very usefull.
Although writing the software might be fun, I've realised that it is fairly trivial to force a whole vehicle model to generate the data -basically constrain it to run at constant sideslip and steer angle, and measure the forces, so that's what i'll do. Zero time spent modelling.
#4
Posted 20 December 2011 - 05:47
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#5
Posted 20 December 2011 - 07:48
I used MMM for comparison of different driveline's based on a single platform. Validation with a 2WD and AWD prototype gave very good results up too 1g lat acc! I made a few matlab m-files for the calculations. Im not quite sure about the extent of milikens software, but the diagram contains lots of information and I thought it was very usefull.
Are the M-Files proprietary or could I see them? I have a full seat of Matlab and would love to tinker with them.
#6
Posted 20 December 2011 - 12:37
Thanks. I know Ben has used it and one other tire engineer, I think they both wrote their own solvers.Although writing the software might be fun, I've realised that it is fairly trivial to force a whole vehicle model to generate the data -basically constrain it to run at constant sideslip and steer angle, and measure the forces, so that's what i'll do. Zero time spent modelling.
I did something similar. Having a full model will probably be beneficial for highly dynamic application, but even without the model the results for non SS are good (at least in a "sportier"vehicle). The results depend mainly on the tyre model.
Are the M-Files proprietary or could I see them? I have a full seat of Matlab and would love to tinker with them.
Im not sure about that: the report has been locked from publication till mid 2016. However I'm probaby meeting my supervisor whom I did the project for in a couple of days so will ask him. In the mean time I would be glad to help you with any questions you have. The best resource I found was SAE paper 760712, good in depth explanation and examples. Should you have trouble obtaining it please PM me.
Edited by Malmedy, 20 December 2011 - 13:02.
#7
Posted 20 December 2011 - 21:15
I'd emphasise Malmedy's point, it is mostly about tire properties. It tells you nothing about shock absorbers, PMI, and no doubt some other things.