Measurement-computing eZ-PostView rev.2.0 Manual de usuario descargar pdf (Pagina 124)

5-6 Interactive Plot Display 969895 eZ-Analyst

Using the Toolbar Buttons

Function Description / Comments

1 Add New FV Window Adds a new Function View.

2 Tile Horizontally Tiles two or more Function Views such that they are longer in the

horizontal direction.

3 Tile Vertically Tiles two or more Function Views such that they are longer in the vertical

direction.

4 Time A single-channel display function. Displays a time domain waveform of

filtered, sampled data scaled in either Volts or EUs.

5 Auto-Spectrum A single-channel display function. Displays the square of the magnitude

of the complex (one-side) Fourier spectrum of x(t). Autospectra are

calibrated so that if A is the peak amplitude of a sinusoidal signal x(t),

then the autospectrum has the value A*A (or use A power 2) at the

sinusoidal frequency.

6 PSD

(Power Spectral

Density)

Power Spectral Density (PSD) displays the power of random vibration

intensity as “mean-square acceleration per frequency unit.” PSD is a

single-channel display function. It is the Fourier Transform of the Auto-

correlation function. This normalization should be used with continuous

random signals.

7 Spectrum A dual-channel display function. Displays averaged linear spectrum

computed as the square root of the averaged autospectrum.

8 FRF A dual-channel function for the single-input, single-output (SISO)

frequency response function between two specified input channels. FRF is

the averaged cross-spectrum divided by the averaged autospectrum of

the input (the second named channel). When the FRF (#8) or the Cross

(#9) button is clicked on; then the following buttons for more complex

data displays become active. These buttons, not shown in the above

figure, will appear in the toolbar between buttons #15 and # 21.

Magnitude: Plots only the magnitude of real or complex data.

Phase: Plots only the phase of complex data.

Magnitude and Phase: Plots both Magnitude and Phase data.

Real: Plots only the Real numbered data.

Imaginary

Real and Imaginary: Plots both Real and Imaginary data.

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Measurement-computing eZ-PostView rev.2.0 Manual de usuario Pagina 124