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An '''open-loop controller''', also called a '''non-feedback controller''', is a type of [[Controller (control theory)|controller]] that computes its input into a system using only the current [[state (controls)|state]] and its [[mathematical model|model]] of the system.
A characteristic of the open-loop controller is that it does not use [[feedback]] to determine if its output has achieved the desired goal of the input. This means that the system does not observe the output of the processes that it is controlling. Consequently, a true open-loop system can not engage in [[machine learning]] and also cannot correct any errors that it could make. It also may not compensate for disturbances in the system.
Open loop control system is"physical system which does not automatically correct for variation in its output, is called OPEN LOOP CONTROL SYSTEM".
In this system the output remains constant for a constant input signal provided, the external conditions remains unaltered.
== Examples ==
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