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High values of friction explanation

asked 2016-05-22 15:53:02 -0500

gizelle gravatar image

updated 2016-05-23 11:32:43 -0500


I have a rather simple question but I can not find a simple answer anywhere. Ground plane in gazebo has these parameters for friction:

mu1 = 100

mu2 = 50

I read on wikipedia and tried to find some sample in real world that has similar friction value, however all of of them were below 1.

I have found this other question here on forum, but I still lack a simple "explain me like im 5" explanation.

What do these precise high values of friction mean? Does it mean my robot is going to feel no friction at all or is it going to make its navigation difficult due to it?

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answered 2016-05-30 08:46:58 -0500

debz gravatar image

I think the answer you linked is pretty good. Two factors are to be explained:

  • Physics says that friction can be higher than 1 (there is a mistake in the documentation of ODE), even if most materials are between 0 and 1.
  • In case of contact, ODE will take the lowest friction parameter of the two materials colliding. Choosing an extremely high value for the ground is a way to avoid limitation, i.e. this is your models parameters that should always be taken in account.
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Asked: 2016-05-22 15:48:12 -0500

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Last updated: May 30 '16