For this reason, closed loop controllers are also called feedback controllers.
2.
A closed-loop controller uses feedback to control outputs of a dynamical system.
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This is a closed-loop controller.
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To overcome the limitations of the open-loop controller, classical control theory introduces feedback.
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In industrial process control, thousands of analog loop controllers were used to automatically regulate temperature, flow, pressure, or other process conditions.
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For this reason, more complex robots and machine tools instead use servomotors rather than stepper motors, which incorporate encoders and closed-loop controllers.
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A rangefinder is a device to measure subject distance, with the intent to adjust the focus of a camera's objective lens accordingly ( open-loop controller ).
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Some digital loop controllers offer a self-tuning feature in which very small setpoint changes are sent to the process, allowing the controller itself to calculate optimal tuning values.
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Controllers for brushed motors however are much simpler and cheaper due to the fact they don't require hall sensor feedback and are typically designed to be open-loop controllers.
10.
:May you explain for us why the article open-loop controller doesn't answer your question ?-- & trade; 12 : 57, 8 October 2008 ( UTC)
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