[comp.robotics] relative position sensor for tracked-robot

feng@caen.engin.umich.edu (Liqiang Feng) (10/22/90)

I am working on a navigation problem of a tracked-mobile-robot, I need 
the relative position information of the robot, which is readily 
available on wheeled-robot with the use of encoders. But for the 
case of tracked-robot, this is not directly applicable. Does anybody 
out there have any suggestions on how to measure the relative position 
for a tracked-mobile-robot? Your suggestions are greatly appreciated. 
Thanks in advance.