Table 1.
Fitted model of the force-to-output voltage curve.
| Fitting Model Coefficients (with 95% Confidence Interval) | Fit Goodness | ||||||
|---|---|---|---|---|---|---|---|
| Sensor # | A1 | c1 | A2 | c2 | RMSE [N] | R2 | RMSE [% fsr] |
| #1 | 2.144 (1.885, 2.404) | 1.651 (1.041, 2.261) | −2.382 (−2.661, −2.104) | −63.090 (−83.200, −42.970) | 0.123 | 0.991 | 3.505 |
| #2 | 2.328 (2.140, 2.516) | 1.309 (0.937, 1.681) | −2.283 (−2.480, −2.087) | −56.430 (−68.020, −44.840) | 0.086 | 0.995 | 2.462 |
| #3 | 2.123 (1.904, 2.343) | 0.9219 (0.614, 1.230) | −2.242 (−2.522, −1.963) | −55.290 (−74.14, −36.45) | 0.135 | 0.988 | 3.983 |
| #4 | 2.228 (1.996, 2.460) | 1.303 (0.872, 1.735) | −2.282 (−2.533, −2.032) | −46.590 (−59.140, −34.040) | 0.113 | 0.992 | 3.222 |
| #5 | 1.892 (1.716, 2.069) | 1.328 (0.986, 1.671) | −1.894 (−2.093, −1.695) | −58.890 (−75.800, −41.970) | 0.101 | 0.993 | 2.900 |
| #6 | 2.315 (1.954, 2.676) | 1.342 (0.664, 2.020) | −2.399 (−2.800, −1.998) | −69.010 (−101.300, −36.700) | 0.195 | 0.980 | 5.579 |
| #7 | 2.006 (1.773, 2.239) | 1.539 (1.158, 1.920) | −2.001 (−2.295, 1.706) | −61.090 (−87.970, −34.220) | 0.155 | 0.988 | 4.424 |
| #8 | 2.488 (2.166, 2.811) | 1.153 (0.598, 1.708) | −2.452 (−2.775, −2.129) | −39.820 (−51.260, −28.370) | 0.120 | 0.992 | 3.404 |
| #9 | 2.053 (1.892, 2.213) | 1.159 (0.881, 1.436) | −2.087 (−2.250, −1.924) | −33.920 (−40.500, −27.330) | 0.067 | 0.996 | 1.915 |
| #10 | 2.188 (1.717, 2.658) | 1.903 (0.629, 3.178) | −2.153 (−2.630, −1.675) | −61.170 (−95.270, −27.070) | 0.199 | 0.976 | 5.698 |
| #11 | 2.287 (1.846, 2.727) | 1.593 (0.473, 2.713) | −2.202 (−2.646, −1.759) | −62.980 (−92.800, −33.170) | 0.177 | 0.981 | 5.055 |
| #12 | 2.555 (2.194, 2.916) | 1.164 (0.527, 1.802) | −2.545 (−2.897, −2.192) | −36.570 (−47.970, −25.160) | 0.124 | 0.992 | 3.543 |
| All | 2.352 (2.235, 2.468) | 0.999 (0.8051, 1.193) | −2.326 (−2.449, −2.203) | −44.840 (−50.820, −38.850) | 0.221 | 0.962 | 6.303 |