ABSTRACT
Working with high order transfer function needs a lot of work. Transfer
functions of high order may be approximate as low order transfer function
with time delay. This done by First Order Plus Dead lime (l'()l’I)'l‘)_
Second ()rder Plus Dead Time (SOPDT) and Skogestad.
The main objective ofthis research is to approximate the higher order
transfer function to first and second order transfer function using the three
methods. Then compare the result with the original plant transfer function
so as to test the dependency of these methods .
DC motor speed transfer function was taken as model to verify the result.
