METHOD OF DETERMINING PERTURBATION AND WOBBLING OF VERTICAL AXIS OF ROTARY SUPPORT Russian patent published in 2014 - IPC G01B11/26 G01B11/27 

FIELD: physics.

SUBSTANCE: method includes using two autocollimating theodolites and a polygonal mirror prism which is placed in a horizontal plane, aligning its centre with the vertical axis of rotation. The theodolites are directed on the faces of the polygonal prism such that their axes of sight are on the same level with the polygonal prism and form an angle of 90° with each other. For each j-th installation, where j=1,2,…, n is the number of prism faces, of the vertical axis, the inclination angles of corresponding prism faces are measured for forward and reverse rotation of the axis. The values of the angles are read from the vertical circle of the theodolite when the grid of the theodolite is superimposed with its autocollimation image. The values of coordinates V_1j, V_2j of the perturbation vector of the vertical axis are calculated using the formula: $$V_{\mathrm{1,}j}=\frac{x_{for}-x_{rev}}{2},$$ $$V_{\mathrm{2,}j}=\frac{y_{for}-y_{rev}}{2}$$ and values of coordinates B_1j, B_2j of the wobbling vector are calculated using the formula: B_1,j=x_jfor-x_jrev, B_2,j=y_jfor-y_jrev, where: x_j is the value of the inclination angle of the j-th face, which corresponds to the first theodolite and is measured during forward and reverse rotation of the axis; y_j is the value of the inclination angle of the j-th face which corresponds to the second theodolite and is measured during forward and reverse rotation of the axis.

EFFECT: simplification and shorter time required to calculate perturbation and wobbling of vertical axes.

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