Level Control

Water is fed into a tank at a variable rate. The outflow from the tank is pumped through either a conventional control valve or one with a valve positioner. The two valves have different flow characteristics: equal percentage and linear trim. The effect of a sticking control valve is demonstrated.

Control techniques studied:

  • Mathematical Modeling
  • Sensor calibration and actuator characterization
  • Feedback stabilization
  • Root-locus analysis