Feedback is information on how well a system is performing and it is essential for system modifications. System may use feedback for control. The information generated by comparing results with acceptable level of performance and informing the control elements of the difference is termed as feedback.
Every system uses a basic control model consisting of :-
Every system uses a basic control model consisting of :-
- A standard for acceptable performance
- A method of measuring actual performance
- A means for comparing actual performance against standard.
- A method for feedback.
In feedback control, the output is fed back to input and/or to the control.
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