Degree of Freedom:- It is defined as number of indipendent co-ordinates to specify position of any body.
A body has 6 degree of freedom:-
Three Translational
Three Rotational
In a mechanism total no. of degrees of freedom is given by
F = 3(n – 1) – 2j
where n is no. of links and
j = no. of joints (simple hinges)
most of the mechanism are constrained so F = 1 which produces
1 = 3(n – 1) – 2j
Þ 2j – 3n + 4 = 0 this is called Grubler’s criterion. If
there are higher pairs also no. of degrees of freedom is given by
F = 3(n – 1) – 2j – h
where h = no. of higher pairs.
A body has 6 degree of freedom:-
Three Translational
Three Rotational
In a mechanism total no. of degrees of freedom is given by
F = 3(n – 1) – 2j
where n is no. of links and
j = no. of joints (simple hinges)
most of the mechanism are constrained so F = 1 which produces
1 = 3(n – 1) – 2j
Þ 2j – 3n + 4 = 0 this is called Grubler’s criterion. If
there are higher pairs also no. of degrees of freedom is given by
F = 3(n – 1) – 2j – h
where h = no. of higher pairs.
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| Degree of Freedom |
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