  Regenerated (FRF curves), synthesis of (FRF) curves there are two main
requirement in the form of response model, The first being that of regenerating
"Theoretical" curve for the frequency response function actually measured and
analysis and the second being that of synthesising the other functions which
were not measured,(FRF) that isolates the inherent dynamic properties of a
mechanical structure. Experimental modal parameters (frequency, damping, and
mode shape) are also obtained from a set of (FRF) measurements. The (FRF)
describes the input-output relationship between two points on a structure as a
function of frequency. Therefore, an (FRF) is actually defined between a single
input DOF (point & direction), and a single output (DOF), although the FRF was
previously defined as a ratio of the Fourier transforms of an output and input
signal. In this paper we detection FRF curve using Nyquist plot under
gyroscopic effect in revolving structure using computer smart office software.
  Keywords - FRF curve; modal test; Nyquist plot; software engineering;
gyroscopic effect; smart office.
