Jimin He, Zhi-Fang Fu, Frequency response function measurement, Modal Analysis 2001, p. 140-158.He J, Fu ZF (2001) Frequency response function measurement. In: He J, Fu ZF (eds) Modal Analysis. Butterworth Heinemann, Oxford, pp 140-158He J, Fu ZF (2001) Frequency response function measurement. In: He J, Fu ZF (eds) Mod...
The frequency response function is theoretically defined already in Ch. 1; however, experimental identification is always contaminated with measurement noise. The noise is present at the input/excitation output/response measurements. This section deals with the measurement and signal processing details, wh...
The FRF function is simply the ratio of the system’s output response due to an applied excitation. Engineers use FRFs to measure and characterize a structure’s dynamic behavior. The measurement of Frequency Response Function (FRF) is the basis for the Experimental Modal Analysis (EMA). ...
ynchronous Machines Measurement and Estimation of the Multivariable Frequency Response Functions of Synchronous MachinesMeasurement and Estimation of the Multivariable Frequency Response Functions of Synchronous MachinesDedenePintelonLataire
Measurement Principle and Leakage-Free Operation The frequency response function is defined as the system response divided by the system drive as a function of frequency. If we choose a drive with a flat spectrum inside the frequency band of interest, we can get the frequency response function fr...
Keysight's InfiniiVision 1000 X-Series oscilloscope is the first oscilloscope that can per form frequency response analysis automatically in the frequency-domain, if equipped with the optional function generator (WaveGen). To set up an FRA measurement, first define the following test parameters in ...
Speeding up the frequency response measurement matters, e.g. for imaging applications such as laser scanning vibrometry, due to the large number of spectra that need to be acquired. It's also welcome for the characterization of high-Q resonators (MEMS) where the sweep speed is limited by the...
The frequency-response function of a discrete-time system can be expressed as the Z-transform of the time-domain transfer function of the system, evaluated at the unit circle. Compare the modalfrf estimate with the definition. Get [b,a] = ss2tf(A,B,C,D); [ztf,fz] = freqz(b,a,204...
For example, visualize the frequency response data using bode. Get bode(sys) By default, the frd function assumes that the frequencies are in radians/second. To specify different frequency units, use the TimeUnit and FrequencyUnit properties of the frd model object. For example, set the ...
Audio power amplifier gain is normally measured and cited at 1kHz, which is the notional middle of the audio band, and also a tidy number. Gain is often not measured explicitly, as it can be derived from thefrequency responsemeasurement, providedthe input level is recorded (in dBu). The ga...