OPTIC-ELECTRONIC SYSTEM FOR DEFORMATION MEASUREMENT OF RADIO-TELESCOPE COUNTER-REFLECTOR COMPUTER MODELLING

摘要

The metrological maintenance of many measurement tasks requires measuring spatial position of some control objects relative to rigid base. The microwave radio-telescope development requires high-precision control for the position of the counter-reflector. The construction elements weight and thermal deformation leads to changes of position and linear shift of each planar section relative to theoretical parabola. In this case it is necessary to realize special control system for controlling these deformation. The triangulation method is chosen to solve this problem. This method means CCD camera, placed on the base object. On the control object there are placed elements, determining its spatial position. The special construction element - the base ring — acts as a base object. The rigid base ring is placed in the top of the main mirror and is a motionless measurement base. In accordance to the method video camera measures the LED vision angles. For the system errors research it is effective the computer modeling. The experimental research of the structure of the system error was made with the realized computer model. The result of the taken analysis are the primary errors influencing the error of linear and angular position measurements of control object.