在此公布mcs专家对
WARNING: For TIRE JEEP.TIRE_1 the absolute value of the longitudinal slip ratio
has gone beyond its maximum allowable limit of 1.0.
Longitudinal slip ratio = 1.0021.
If the longitudinal slip ratio is positive, it will be set
to 1.0 (braking). If the longitudinal slip ratio is
negative, it will be set to -1.0 (traction).
的回复：
What you see is just a warning, not an error that will stop your simualtion. And with a ratio of only 1.0021, I would not be concerned if the resutls look ok. THe warning is just there to tell you that the slip will be set to one.
If you had a warning avout a ratio of 1000.0 I would be concerned, even though this often occurs (very, very common to see models where the chassis has a iniital velocity, but the tire spin velocity is not set; then the slip will initially be very larger; after half a second it is stablilized in most cases).
A ratio of 1.0021 could easily happen if you have a torque controller for braking. The little overshoot will generate the warning, but it does not affect the simualtion.
For most tire models this warning indicates that the tire contact area is saturated, i.e. the force will not change even if the slip gets larger. Therefore the slip is internally set to one.