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{{Main|Negative feedback|Positive feedback}}
{{Main|Negative feedback|Positive feedback}}
主要|消极反馈|积极反馈
主要|负反馈|正反馈
[[File:Set-point control.png|thumb|350px|Maintaining a desired system performance despite disturbance using negative feedback to reduce system error]]
[[File:Set-point control.png|thumb|350px|Maintaining a desired system performance despite disturbance using negative feedback to reduce system error]]