PD control
type: Concept
alternative label: proportional + derivative control
broader: two-term control
broader: proportional control
preferred label: واپایش پی.دی. @fa
scope note: کنترل پی.دی. @fa

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

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