Abstract: In order to study the effect of extreme temperature environment to pointing accuracy of tracking telescope, utilize finite element analysis software ANSYS Workbench, establish finite element model of tracking telescope frame, obtain temperature field distribution of frame under the action of solar radiation, air convection, heat generation of electric device, and heat conduction in high and low temperature environment by steady-state thermal analysis; then obtain thermal deformation of frame under the action of temperature field above by static structural analysis. The analysis results show that slant angle of frame set of axes within the error range allowed in high and low temperature working condition. Come to the conclusion that: the azimuthal rotating axis, pitching rotating axis and collimation axis of tracking telescope frame almost no slant, and pointing accuracy of tracking telescope almost no influence in extreme temperature environment.

Key words: tracking telescope, environment temperature, convection heat transfer, steady-state thermal analysis, static structural analysis