更改

{{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]]