Reports 1-1 of 1 Clear search Modify search
AdV-COM (AdV commissioning (1st part) )
fiori, paoletti, boschi - 17:15 Thursday 23 November 2017 (40137) Print this report
shaker injections DT tower W flange

today we repeated the shaker sweep injection performed before O2. here the parameters used

/users/fiori/home/AdV/Commissioning/Injections/scripts>ENV_swept_sine_cured.py
DAC channel (i.e. NOISE_CEB_DAQroom, EEroom, DetEER, NOISE_WEB,NEB): NOISE_CEB_DetEEroom
Log file name (to be read by Matlab code): log_DT_W_flange_23112017.txt
Start frequency (Hz): 60
Stop frequency (Hz): 800
Number of points (integer): 150
Number of averages (integer): 4
Number of cycles (integer): 10
Minimum average time (float, seconds): 8
Please enter measurement amplitude envelope in freq/amp pairs (a single amplitude is accepted)
For example (3 envelope points): 1 5e-1 10 5e-2 100 2e-2
Measurement amplitude envelope in freq/amp pairs: 1

Hrec looks most affected around 450Hz.

The log file with all gps and frequencies is attached.

Images attached to this report
Non-image files attached to this report
Comments to this report:
koley - 17:03 Monday 27 November 2017 (40162) Print this report
Noise projections for the injections at DT W Flange were performed using a quiet time starting 1195430418 and a length of 600 s.

Noise projections were performed using the accelerometer data from both ENV_DT_ACC_Z and ENV_DT_W_FLANGE_ACC_Z. Figure 1 and 2 shows the transfer function computed on DARM and Hrec respectively corresponding to each of the accelerometer data.

Figure 3,4 shows the noise projection on DARM pertaining to each of the accelerometers again.

Figure 5,6 shows the noise projection on Hrec for each of the accelerometers.

The noise projection limits the sensitivity most at 420 Hz and surrounding regions. A small bump is also observed in quiet DARM at the same frequency of 420 Hz.Figure 7 shows the FFT of DARM during the injection at 420 Hz, where the impact of the injection was maximum.
Images attached to this comment
Search Help
×

Warning

×