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. Author manuscript; available in PMC: 2018 Jun 1.
Published in final edited form as: IEEE Sens J. 2017 Apr 18;17(11):3526–3541. doi: 10.1109/JSEN.2017.2694965

Fig. 12.

Fig. 12

Axial force computation results for local linear calibration using samples with limited roll (α ≤ 30°) and pitch (β ≤ 15°) angles (black), and for global nonlinear calibration (blue): (a,b) The comparison of computed values to the actual force level, (c,d) variation of error with respect to the axial force magnitude, (e,f) probability distribution of residuals (bin size = 0.1 mN). The latter provides almost the same sensing accuracy as the local fitting, but for the entire range of force directions.