CS student help needed in motor selection

[munim]

i m designing a human tracking robot i cant find the motors specified to my needs Design is in attachment
Weight on the base will be 6-7 kilograms
need dc motors to attain 30 km/speed how much rpm motor do i need

[bdeuell]

there is some information in the tutorials section regarding calculating motor torque. search the posts and web as well.

a couple notes:
- what units is your speed in?
- you will probably need a gearbox (or some other speed reduction)
- what acceleration do you need?
- what surface is it driving over?
- does it need to go up any incline if so how steep?
- how much will the robot weigh (i'm assuming the weight provided is for the payload)?

[munim]

there is some information in the tutorials section regarding calculating motor torque. search the posts and web as well.

a couple notes:
- what units is your speed in?
- you will probably need a gearbox (or some other speed reduction)
- what acceleration do you need?
- what surface is it driving over?
- does it need to go up any incline if so how steep?
- how much will the robot weigh (i'm assuming the weight provided is for the payload)?

speed is in km/hrs.
surface is ceramics/home tiles/wood floor.
i think i will be able to control acceleration with my aurdino.
not using robot for inclined surfaces yet.
total weight will be 10 kg of robot and the payload
Thanks for replying appreciate ur concern.

[bdeuell]

here is a forum discussion that covers calculating motor torque in some depth

http://www.societyofrobots.com/robotforum/index.php?topic=17987.msg122913#msg122913