Non-conventional techniques for Frequency Response Function measurements and analysis

The goal of the paper is to establish real implementable identification methods to obtain directly either the magnitude and phase function or the real and imaginary component of the frequency response of the plant. The proposed non-conventional methods are applied to the phase function measurement by sweep sine input signal, by the measurement of the real and imaginary part either with the pseudo - correlation technique or with the sample and hold technique. The advantages of the methods are highlighted by three case studies simulation results.