Ashraf Abd Almageed Ahmad, Dr.Eltahar Mohammed Hussein
This paper tackles the disturbances in control operation in close-loop and its effect on the system by studding transfer function in presence and absence of disturbances. An example controlling a mechanical system is taken and the unexpected outside element effect consider here as disturbance, the close-loop feedback transfer function of the system. The model of the mechanical system is showing the effect of the disturbances obviously to the all system