### Author Topic: How to calculate degree of freedom & centre of gravity of an exploration rover  (Read 3858 times)

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#### pratik

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##### How to calculate degree of freedom & centre of gravity of an exploration rover
« on: April 17, 2009, 11:47:12 AM »
HI Friends ,
i want to know the formula for calculating the degree of freedom & center of gravity of a rover....

#### galannthegreat

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##### Re: How to calculate degree of freedom & centre of gravity of an exploration rover
« Reply #1 on: April 17, 2009, 12:27:39 PM »
Can you give a more specific question, that is very vaigue.
Kurt

#### Soeren

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##### Re: How to calculate degree of freedom & centre of gravity of an exploration rover
« Reply #2 on: April 19, 2009, 11:25:01 AM »
Hi,

i want to know the formula for calculating the degree of freedom & center of gravity of a rover....
If you have a link like eg. an elbow, that will rotate(/bend) in one plane, it is 1 DOF. If it can rotate in another plane as well, it's 2 DOF and so on - no formula, just plain old counting.

The center of gravity can be found (for a 2D representation) by placing the ROVer with each wheel on a weight (or one wheel at one weight and the other wheels levelled to match in a pinch, if you are short of weighing equipment).
If you need a 3D representation, it gets a bit more complicated to find on the kitchen table.
Regards,
Søren

A rather fast and fairly heavy robot with quite large wheels needs what? A lot of power?
Please remember...
Engineering is based on numbers - not adjectives

#### Admin

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##### Re: How to calculate degree of freedom & centre of gravity of an exploration rover
« Reply #3 on: May 04, 2009, 04:54:57 PM »
My CAD software tells me the center of mass for me . . .

As for DOF, its fairly useless knowledge for a mobile robot on a 3D plane in the real world.

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