International Journal of Engineering and Information Systems (IJEAIS)   Year: 2019 | Volume: 3 | Issue: 5 | Page No.: 57-66 Comparasion of 1DoF IMC and 2DoF IMC Method to Control Shell Heavy Oil Fractionator(SHOF) Model Budi Setiyono, Sumardi, Fatamorgana Surgani, Aris Triwiyatno, Imam Santoso, Sudjadi, M Arfan, Maman Somantri Abstract: Shell Heavy Oil Fractionator (SHOF) is a distillation column type used to separate crude oil into desired products based on the boiling point difference of each product. The design of control on SHOF has several constraints, it is caused by non-linearity of the process, mulrivariable interactions, long dead time, and disturbances. It needs the control method that make the system response track the set point and eliminate the disturbances. This research is designed comparasion of 1 DoF IMC and 2 DoF IMC method to controlling SHOF with 3x3 MIMO decentralized in the form of First Order Plus Dead Time (FOPDT). Filter parameter tuning on this controller using Rivera filter parameter tuning method. Interaction between subsystems is reduced by applying the Relative Gain Array method and decoupling. The designed controllers were simulated in the MATLAB/SIMULINK environment. From the simulation results it was proven that the 2 DoF IMC showed the better performance compared to 1 DoF IMC with IAE respectively value of 44,4454 at , 19,2279 at , and 0,1483 at on set point tracking test respectively, and IAE value 93,9574 at , 40,0455 at , and 0,0099at on disturbance rejection test.