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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