Many industrial systems can be modeled using a transfer function with time delay. This time delay causes many problems in analysis of the system. To control a system with time delay, a Mr Smith (in around mid 1970s, I guess) has proposed a compensation technique that adds a feedback loop around...
Hi,
This is not that simple! GPS seems the best choice, but needs too much work.
Radio frequency (RF beacons and antenna, RFID is something else!) works to find the direction; I am not sure about measuring the distance.
I would suggest "Beacon method"; take a look at this...
Hi,
These links may help:
http://www.hobby-lobby.com/wheels.htm
http://www.robotobjects.com/scripts/prodList.asp?idCategory=41
And some tips:
http://www.societyofrobots.com/mechanics_chassisconstruction.shtml#wheels
Mehdi
