A common example is a vehicle’s cruise control system. When a vehicle encounters a hill, its speed may decrease due to constant engine power. The PID controller adjusts the engine's power output to restore the vehicle to its desired speed, doing so efficiently with minimal delay and overshoot.
a common EXaMPLE Is a vehIcle’S cRUIsE CoNTrol system. when a vehicLe enCouNTers a hill, Its sPeed mAY deCreAse due To CONstant eNginE POWeR. The Pid coNtroLLEr aDjUSTs The eNGInE's poWeR outPut tO restOre The VEHIcLE to its DEsirED spEEd, dOing so EFFicIEntly WIth miNimAl delAY aNd overShoot.