Table 2 Height measurement precision evaluated by different indicators based on absolute (mean and standard deviation – SD), root mean square (RMS) and maximum (max.) errors.
From: An instrumented cylinder measuring pinch force and orientation
Theoretical | |||||||||
|---|---|---|---|---|---|---|---|---|---|
Heights Tested | 10.00 | 20.00 | 30.00 | 40.00 | 50.00 | 60.00 | 70.00 | 80.00 | 90.00 |
Empirical Heights | |||||||||
Mean* (mm) | 10.19 | 20.01 | 30.18 | 40.15 | 50.12 | 59.77 | 69.74 | 80.01 | 89.71 |
Mean SD (mm) | 0.56 | 0.41 | 0.47 | 0.81 | 0.78 | 0.71 | 0.72 | 0.86 | 0.87 |
Mean Error** (mm) | 0.37 | 0.46 | 0.32 | 0.89 | 0.29 | 0.22 | 0.49 | 0.68 | 0.18 |
SD Error (mm) | 0.44 | 0.45 | 0.29 | 1.13 | 0.16 | 0.17 | 0.48 | 0.92 | 0.11 |
RMS Error (mm) | 0.55 | 0.63 | 0.42 | 1.39 | 0.32 | 0.27 | 0.67 | 1.10 | 0.21 |
Max Error (mm) | 1.17 | 1.42 | 0.83 | 3.54 | 0.58 | 0.49 | 1.38 | 3.06 | 0.36 |