1 Introduction
2 Materials and Methods
2.1 Materials
2.2 Experimental Method
2.3 Computational Methods
3 Results
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Training and test data are chosen as subsets from measurements performed on the same bolts, no unknown configurations are introduced in the test set.
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Test data include some experimental configurations that are not included in training data to evaluate how robust the method works and how well it can be generalized.
3.1 Longitudinal Waves
Algorithm | Accuracy (%) | FOR (%) | FDR (%) | Components |
---|---|---|---|---|
LDA | 99.58 | 0.24 | 0.66 | 1 |
PCA | 100 | 0 | 0 | 7–256 |
ICA | 100 | 0 | 0 | 6–12 |
Sensor | Length (mm) | Clamping length (mm) | Preload levels (kN) |
---|---|---|---|
SMP212 | 245 | 196.3/189/172.3 | 0, 20, 40, 60, 80, 100 |
SMP212 | 175 | 126.3/119/102.3 | 0, 20, 40, 60, 80, 100 |
Sensor | Length (mm) | Clamping length (mm) | Preload levels (kN) |
---|---|---|---|
SMP212 | 245 | 196.3 | 0, 20, 40, 60, 80, 100 |
SMP212 | 245 | 196.3 | 0, 10, 30, 50, 70, 90 |
SMP212 | 223 | 189 | 0, 20, 40, 60, 80, 100 |
SMP212 | 175 | 126.3 | 0, 20, 40, 60, 80, 100 |
SMP212 | 153 | 119 | 0, 20, 40, 60, 80, 100 |
Algorithm | Accuracy (%) | FOR (%) | FDR (%) | Components |
---|---|---|---|---|
LDA | 78 | 20.25 | 27.92 | 1 |
PCA | 81.4 | 24.1 | 0.15 | 4 |
ICA | 98.83 | 2.1 | 0 | 11 |
3.2 Shear Waves
Algorithm | Accuracy (%) | FOR (%) | FDR (%) | Components |
---|---|---|---|---|
LDA | 97.85 | 1.38 | 4.55 | 1 |
PCA | 99.65 | 0 | 1.42 | 5, 7–256 |
ICA | 100 | 0 | 0 | 10–21 |
Sensor | Length (mm) | Clamping length (mm) | Preload levels (kN) |
---|---|---|---|
V156 (66416) | 245 | 196.3 / 189 / 172.3 | 0, 20, 40, 60, 80, 100 |
V156 (66416) | 175 | 126.3 / 102.3 | 0, 20, 40, 60, 80, 100 |
Sensor | Length (mm) | Clamping length (mm) | Preload levels (kN) |
---|---|---|---|
V156 (66416) | 245 | 196.3 | 0, 20, 40, 60, 80, 100 |
V156 (66416) | 245 | 196.3 | 0, 10, 30, 50, 70, 90 |
V156 (66416) | 223 | 189 | 0, 20, 40, 60, 80, 100 |
V156 (66416) | 175 | 119 | 0, 20, 40, 60, 80, 100 |
Algorithm | Accuracy (%) | FOR (%) | FDR (%) | Components |
---|---|---|---|---|
LDA | 98.33 | 1.21 | 8.07 | 1 |
PCA | 99.79 | 0.13 | 1.24 | 6 |
ICA | 99.92 | 0 | 1.24 | 17 |