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Controller (control theory)
A controller in control theory is a device that attempts to control states or outputs of a dynamic system. Generally, it accomplishes this using feedback to reject disturbances to the system: known as closed-loop control. Open-loop control also occurs: in systems sufficiently well-characterized to predict what inputs will necessarily achieve the desired states or outputs. For example, the velocity of a motor may be well-characterized for the voltage fed into it, in which case feedback may prove unnecessary. PID controller is commolny used controller type.
Last updated: 05-28-2005 22:28:35
10-26-2009 08:16:03
The contents of this article is licensed from www.wikipedia.org under the GNU Free Documentation License. Click here to see the transparent copy and copyright details
The contents of this article is licensed from www.wikipedia.org under the GNU Free Documentation License. Click here to see the transparent copy and copyright details