Depending on your definition of "low cost", you could use 2 accelerometers (one at the front of the vehicle and one at the rear). If front accel is greater than rear you have understeer, if rear accel is greater than front you have oversteer.
John,
I am using NX4. I didn't see an unsew feature in the Combine Bodies command list. Is it in a different location, or does NX4 not have this feature?
What is the best way to make a sheet body a solid body? Our designer uses Rhino and then sends us parasolid or iges files, which then require hours of trimming, extending, closing gaps, sewing, offsetting... Is there a tool or feature that does this automatically or at least quicker than having...