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Table 2
Comparison of accelerometer, fixed camera and UAV acquisition frequency.
| Suspender number | Measurement method | f1 | f2 | Frequency (Hz) f3 |
f4 | f5 | Mean error (%) |
|---|---|---|---|---|---|---|---|
| N5 | ACC | 3.809 | 7.617 | 11.475 | 15.332 | 19.238 | |
| CAM | 3.779 | 7.588 | 11.367 | 15.264 | 19.248 | ||
| Relative error (%) | 0.79% | 0.38% | 0.94% | 0.44% | 0.05% | 0.52% | |
| UAV | 3.645 | 7.617 | 11.367 | 14.707 | 18.633 | ||
| Relative error (%) | 4.31% | 0% | 0.94% | 4.08% | 3.14% | 2.49% | |
| N6 | ACC | 3.809 | 7.568 | 11.377 | 15.186 | 19.189 | |
| CAM | 3.809 | 7.588 | 11.338 | 15.234 | 19.072 | ||
| Relative error (%) | 0% | 0.26% | 0.34% | 0.32% | 0.61% | 0.31% | |
| UAV | / | 7.676 | 11.338 | 14.736 | 19.102 | ||
| Relative error (%) | / | 1.43% | 0.34% | 3.27% | 0.45% | 1.37% | |
| N7 | ACC | 3.711 | 7.471 | 11.230 | 14.990 | 18.848 | |
| CAM | 3.691 | 7.412 | 11.191 | 14.912 | 18.808 | ||
| Relative error (%) | 0.54% | 0.79% | 0.35% | 0.52% | 0.21% | 0.48% | |
| UAV | 3.691 | 7.441 | 11.191 | 14.941 | 18.808 | ||
| Relative error (%) | 0.54% | 0.40% | 0.35% | 0.33% | 0.21% | 0.37% | |
| N8 | ACC | 3.711 | 7.471 | 11.279 | 14.990 | 18.799 | |
| CAM | 3.712 | 7.441 | 11.191 | 14.971 | 18.809 | ||
| Relative error (%) | 0.03% | 0..40% | 0.78% | 0.13% | 0.15% | 0.3% | |
| UAV | 3.712 | 7.441 | 11.191 | 14.941 | 18.779 | ||
| Relative error (%) | 0.03% | 0.40% | 0.78% | 0.33% | 0% | 0.31% |
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