PI control
type: Concept
alternative label: proportional + integral control
broader: two-term control
broader: proportional control
preferred label: واپایش پی.آی. @fa
scope note: واپایش یکپارچه و تناسبی @fa

proportional control
type: Concept
narrower: PI control
preferred label: واپایش تناسبی @fa

two-term control
type: Concept
narrower: PI control
preferred label: واپایش دوزمانه @fa