Tank response to the fluid flow gain150 cm/(kg/sec)Time constants10 secTank response to variation of process fluid flow gain 1 cm/(kg/sec)Tank response to variation of process volume gain3 cmControl valve capacity1,6 kg/sec Time constant of control valve3 secVolume Level Set Point200 mTime constant of volume sensor10 secFrom the above experimental data the transfer function model of the system is derived. The transfer function of different component of the transfer function model are summarized below.Transfer function of processGain of valve 0.13Transfer function of valveGain of current to pressure converter 0.75Transfer function of disturbance variables (flow and volume disturbances respectively)Transfer function of volume sensor

Input Flow Disturbance

Input Volume Disturbance

SensorSet PointProcessValvePIDController

Gambar PID ketika switch on

vGambar Output dari signal scope