Degrees of Freedom and Mobility
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5 Terms
Degrees of Freedom (DOF)
These are the parameters needed to uniquely define a systems configuration
Has 6 Degrees, rotation and translation around X,Y and Z
Sliders and Hinges
Complex systems can be broken down into combinations of sliders and hinges to help us analyze their motion (use kinematic diagrams)
Sliders 1 DOF
Hinge 1 DOF
Mobility
This is a numerical measure of how contrained or unconstrained a system is.
It is realted to the DOF
DOF = mobility when it is an open loop linkage (connected in series)
DOF does not = mobility for close loop linkages, connected in parallel
Mobility Calculation
Calculated through Grueblers Equation (only for 2D mechanisms not 3D)
Mobility categories
Mobility is > or = 1 gives a linkage (can move)
Mobility = 0 gives a structure
Mobility < 0 statistically indeterminate (cannot move or overconstrained
Note 
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