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. 2012 Jul 28;9:51. doi: 10.1186/1743-0003-9-51

Table 3.

Effect of the noise on GRF components

   
ML
AP
V
Speed [m/s] mean (std) [N] P [W] mean (std) [N] P [W] mean (std) [N] P [W]
ni
1.00
−0.20 (0.09)
0.04
−0.23 (0.09)
0.05
0.01 (0.14)
0.02
(without belts)
nm
0.50
1.39 (0.27)
1.62
6.58 (0.78)
35.35
−0.12 (0.87)
0.79
1.00
1.45 (0.53)
2.00
5.61 (0.93)
26.17
−0.22 (1.96)
3.84
 
1.50
1.53 (0.83)
2.57
4.92 (1.71)
22.35
0.19 (1.82)-
3.28
  1.88 1.56 (1.52) 4.27 4.57 (1.34) 18.65 0.31 (2.16) 4.74

The table reports both mean and standard deviation (std) of GRF components, and the total power (P) of the power spectral density related to instrumental noise (ni) and noise due to moving parts (nm).