A Ground Test Method for Thermal Stability of Satellite Structure

Abstract

The invention provides a method for a ground test of heat stability of a satellite structure. The method utilizes a ground test system to carry out a heat stability test of the satellite structure, and the system includes a test platform, a structure to be tested, a cubic mirror, a heating unit, temperature measurement units, a theodolite, a data acquisition unit, a programmable power supply, a temperature control computer and a data processing computer. A test process is that the temperature control computer controls the programmable power supply to adjust heating power of the heating unit, a test temperature range of each temperature working condition test includes m temperature balance points, in each temperature working condition test, temperature reaches the temperature balance point with the highest temperature value among the m temperature balance points from an initial temperature and then returns to the initial temperature, and the position of the theodolite in each temperature working condition test is fixed and unchanged; and at each temperature balance point, the theodolite is aligned with a reflecting surface of the cubic mirror in real time, the rotating angle of the cubic mirror is obtained according to readings, and the rotating angle is sent to a data processing computer in real time, and temperature measurement data of all temperature measurement units are recorded at the same time.

Description

technical field [0001] The invention relates to the technical field of ground testing of spacecraft structures, in particular to a ground testing method for thermal stability of satellite structures. Background technique [0002] Based on military and civilian considerations, various space powers in the world have successively developed various remote sensing satellites for the purpose of earth observation, and gradually moved towards commercialization, such as Landsat, Ikonos, QuickBird, WorldView, GeoEye in the United States, SPOT in France, Japan's ASTER, ALOS, India's Cartosat, etc. In order to get rid of the long-term reliance on foreign remote sensing satellites such as the United States and France in my country's remote sensing data market, my country has successively developed and launched a series of land remote sensing satellites, such as the resource series satellites and ZY-3 satellites, but their performance is not as good as that of foreign advanced countries. ...

AI Technical Summary

Problems solved by technology

However, there is no relatively mature high-precision ground experiment technology in China at present. The high thermal stability design of satellites can only be verified by pure calculation methods. Due to the complexity of the satellite structure, the results of pure calculation methods generally have large errors.

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