Research on the Control System of the Ground Attitude Simulation Light Source

The Sun sensor and the infrared Earth sensor are two important components of attitude control after satellite launch. The ground attitude simulation light provides solar simulation signal and infrared Earth analog signal for the two parts as a ground test equipment. This paper designs a set of ground attitude simulation light which consists of one solar simulation light including 4 light seams and one north as well as one south infrared Earth simulators to simulate the opening angle of 15.6°, and provides an analog Sun protection signal for south and north Earth sensors' Sun protection probes. Composition and the overall structure of the ground attitude simulation light control system are described in detail. Through analysis and calculation of each simulation, strict timing relationship between the sources is given, and through the experiments of each source simulation between sequential test, it can be shown that the simulation speed phase-locked error is no more than 1ms, and the angle error between light source simulation timing is less than 0.5°.