Degrees Of Freedom (mechanics)
In mechanics, the degree of freedom (DOF) of a mechanical system is the number of independent parameters that define its configuration. It is the number of parameters that determine the state of a physical system and is important to the analysis of systems of bodies in mechanical engineering, aeronautical engineering, robotics, and structural engineering.
The position of a single car (engine) moving along a track has one degree of freedom, because the position of the car is defined by the distance along the track. A train of rigid cars connected by hinges to an engine still has only one degree of freedom because the positions of the cars behind the engine are constrained by the shape of the track.
An automobile with highly stiff suspension can be considered to be a rigid body traveling on a plane (a flat, two-dimensional space). This body has three independent degrees of freedom consisting of two components of translation and one angle of rotation. Skidding or drifting is a good example of an automobile's three independent degrees of freedom.
The position of a rigid body in space is defined by three components of translation and three components of rotation, which means that it has six degrees of freedom.
The Exact constraint mechanical design method manages the degrees of freedom to neither underconstrain nor overconstrain a device.
Other articles related to "degrees, freedom":
... In electrical engineering degreesof freedomis often used to describe the number of directions in which a phased array antenna can form either beams or nulls ...
Famous quotes containing the words degrees and/or freedom:
“So that the life of a writer, whatever he might fancy to the contrary, was not so much a state of composition, as a state of warfare; and his probation in it, precisely that of any other man militant upon earth,both depending alike, not half so much upon the degrees of his WITas his RESISTANCE.”
—Laurence Sterne (17131768)
“U.S. international and security policy ... has as its primary goal the preservation of what we might call the Fifth Freedom, understood crudely but with a fair degree of accuracy as the freedom to rob, to exploit and to dominate, to undertake any course of action to ensure that existing privilege is protected and advanced.”
—Noam Chomsky (b. 1928)