Research Article
Robust Chatter Stability Prediction of the Milling Process considering Uncertain Machining Positions
Table 4
Modal parameters of two different positions.
| Direction | Modes | Position 1 | Position 2 | Natural frequency ω (Hz) | Damping ratio ζ (%) | Stiffness K (×109 N/m) | Natural frequency ω (Hz) | Damping ratio ζ (%) | Stiffness K (×109 N/m) |
| X | 1 | 504 | 1.98 | 0.88 | 484 | 5.37 | 0.66 | 2 | 912 | 1.97 | 6.58 | 916 | 3.28 | 4.75 | 3 | 1228 | 1.79 | 1.13 | 1252 | 3.99 | 5.47 | 4 | 1392 | 3.00 | 0.39 | 1400 | 4.60 | 0.36 | Y | 1 | 384 | 2.08 | 1.49 | 380 | 4.21 | 3.74 | 2 | 636 | 1.89 | 0.13 | 624 | 5.06 | 0.18 | 3 | 1432 | 1.68 | 1.14 | 1408 | 4.83 | 1.72 |
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