Degrees of freedom: Difference between revisions
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(Created page with "<!-- In mechanics, the number of parameters that can change independently : e.g. :: a railcar has one degree of freedom (back and forth) :: a regular car could be said to...") |
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:: a regular car could be said to have two you control (translation and rotation) but three that can happen (consider skidding sideways) | :: a regular car could be said to have two you control (translation and rotation) but three that can happen (consider skidding sideways) | ||
:: a plane has three (roll, pitch, yaw) | :: a plane has three (roll, pitch, yaw) | ||
:: a | :: a [[boat]] has three (roll, pitch, yaw) though pitch doesn't do much (unless it's a submarine) | ||
In (electronic) sensors, the same idea amounts to the amount of independently sensed/reported things. They do not have to be related, but when part of a single IC they often are | |||
: a 6DOF motion sensor often means a 3D accelerometer and 3D gyroscope | |||
: In that context, a 9DOF may well be that plus 3 magnetic field sensors | |||
: a lot of different sensors would be 1, 2, or 3DOF. There happen to be fewer that get up to 6 or 9, and they're regularly the above | |||
: ...and devices | : ...and devices | ||
:: e.g. bigdog-style robot has 12 servos so can be said to have 12DOF control (matters to the complexity of that control system) | :: e.g. bigdog-style four legged robot has 12 servos so can be said to have 12DOF control (matters to the complexity of that control system) | ||
In statistics, it is the number of values that are free to vary | In statistics, it is the number of values that are free to vary | ||
: for example | : for example | ||
In physics and chemistry, | In physics and chemistry, | ||