Open Access
Table 1
Parameters used in modeling of FDS.
| Parameters used for modeling | Given value |
|---|---|
| Screw mass (ms) | 160 kg |
| Stone lifting platform mass (mt) | 750 kg |
| Axial stiffness of screw (Ksa) | 8.4 × 107 N/m |
| Axial stiffness of supporting bearing (Kna) | 2.3 × 108 N/m |
| Motor rotation angle (θm) | State variable |
| Rotation angle of bevel gear 1 (θg1) | State variable |
| Rotation angle of bevel gear 2 (θg2) | State variable |
| Angle of rotation of nut (θn) | State variable |
| Axial displacement of nut (xn) | State variable |
| Axial displacement of screw (xs) | State variable |
| Axial displacement of the stone lifting platform (xt) | State variable |
| Nut mass (mn) | 15 kg |
| Inertia of nut (Jn) | 1.8 × 10−1 kg · m2 |
| Inertia of bevel gear 1 (Jg1) | 6.67 × 10−4 kg · m2 |
| Inertia of bevel gear 2 (Jg2) | 5.54 × 10−3 kg · m2 |
| Inertia of motor (Jm) | 1.67 × 10−1 kg · m2 |
| Meshing stiffness of gears (K12) | 6.2 × 108 N/m |
| The synthesis torsional rigidity of coupling and bevel gear shaft (Kgn) | 5.83 × 108 N/m |
| The synthesis torsional rigidity of nut and gear 2 (K2n) | 5.8 × 108 N/m |
| The transmission ratio of the nut screw (iR) | 3.18 |
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