A. E. Gorodetsky, V. G. Kurbanov, I. L. Tarasova, A. Yu. Kuchmin

This article provides structure of measuring system of sub-reflector position, control system structure of sub-reflector position and principles of control of sub-reflector position for creation of automatic control system of sub-reflector position of cooled space radio telescope. There is a good reason to build a structure of measuring system of sub-reflector position on the base of lasers placed on the reflecting surface of sub-reflector in a way that their rays, providing the right position of sub-reflector, meet in one point in the centre of the CCD-matrix which is located close by the second focus of mirror system of radio telescope, since in that case the operation algorithm of the control system of sub-reflector position is simplified. The structure of control system of the position of space telescope "Millimetron" sub-reflector may be similar to the structure of the patented system of control of periscope mirror of telescope PT-70. Operation algorithm of automatic control system of sub-reflector position of space radio telescope is simplified in comparison with ground radio telescopes, because it is taken down to the logical analysis of image on CCD-matrix (by the optical system of sub-reflector position measuring) and specifying of controlling forces for electric motors which bring the image on CCD-matrix to the point placed in the centre of the matrix.