DESAIN DAN VERIFIKASI KONTROL CASCADE PADA TEST-RIG PENGENDALI SUHU HEAT EXCHANGER BERBASIS FUZZY-PID SEBAGAI PRIMARY CONTROLLER DAN PI SEBAGAI SECONDARY CONTROLLER

In industry of heat exchanger temperature controllers, there are some disturbances that can affect the performance of heat exchanger system. The disturbance is a change in the outside temperature that goes into the heat exchanger. To overcome such a system, it requires control techniques. In this research, the technique of feedback control and cascade control with fuzzy-PID method were used to make the performance of the system more stable. The testing result of Cascade fuzzy-PID control technique showed that some data indicated performance used in the system. They were rise time (tr) = 3.4933 seconds, overshoot (mp) = 19.00 %, and peak time (tp) = 112 seconds. Furthermore, there was also response of feedback control and cascade control with fuzzy-PID method. Cascade control technique played a role in handling the changes of system parameters, while the combination of fuzzy-PID overcame the interference. The combination of feedback control and cascade control techniques with fuzzy-PID method can make the performance of the system more stable and overcome the interference