Sem.org IMAC XIII 13th 13-21-5 the Effects Window Functions Trigger Levels FRF Estimations From

8/17/2019 Sem.org IMAC XIII 13th 13-21-5 the Effects Window Functions Trigger Levels FRF Estimations From

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Fig. 2 Anti-r sing digital filter characteristics

Fig. 5 FRF from truncated signal (4096 points): (a)

Magnitude; b) Phase Angle (solid: measured: dashed:

original)

Fig. 3 Excitation pulse characteristics: (a) Frequency

spectrum; (b) Time signal (solid: filtered; dashed: origi-

--.

2,

Fig. FRF from truncated signal (1024 points): (a)

Magnitude; (b) Phase Angle (solid: measured; dashed:

original)

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Fig. FRF from exponential window function: (a)Magnitude; (b) Phase Angle (solid: measured; dashed:

original)

Fig. 8 Doubleimpa

(a) Timedomairl

signal; (b)

Frequency spectrum

a

Fig. 9 FRFfrom

double impact, both impacts captured:

(a)Magnit ode;

(b) Phase angle (solid: measured; dashed:

original)

Fig.1

FRF from double impact, only first captured:(a) Magnitude; (b) Phase angle (solid: measured; dashed:

original)

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Fig. 12 - Minimum input pulses: dashed: 5 ; solid: 50%

Fig. 13 5% trigger level FRF: (a) Magnitude; (b) Phase

angle (solid: measured; dashed: original)

Fig. 11 - FRF from mismatch in windows origins: (a)

Magnitude; (b) Phase angle; c) Nyquist plot (solid: mea-

sured; dashed: original)

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a

Fig. 14 50% trigger level FRF: (a) hfagnitude; (b) Phase

angle (solid: measured; dashed: original)

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Sem.org IMAC XIII 13th 13-21-5 the Effects Window Functions Trigger Levels FRF Estimations From

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