Star sensor fault simulation system

Abstract

The invention relates to a star sensor fault simulation system, which comprises a star simulator, a triaxial rotary table, a star sensor, an floatation platform, a rotary table control module, a star simulator control module, an image acquisition and attitude calculating module and a fault analog control module; the star sensor can realize optical imaging, the star simulator can realize space star map simulation, the triaxial rotary table can realize the satellite attitude jitter simulation, the floatation platform can isolate the influence of the external shake on the star simulator, the image acquisition and attitude calculating module can realize the image acquisition and treatment and then calculate the satellite attitude, and the fault analog control module can realize the each module configuration, fault mode configuration and fault simulation flow control in a whole system. The system can realize the fault simulation of the star sensor, the star simulator can simulate the external environment of sky to realize to interfere the produced star sensor fault by the stray light, and the motion of the rotary table is controlled to realize the fault simulation of the star sensor by the satellite attitude jitter.

Description

technical field [0001] The invention belongs to the field of physical simulation of satellite faults, relates to a fault simulation system of a star sensor, and is suitable for verification of fault diagnosis and processing of a satellite control system. Background technique [0002] The star sensor determines the attitude information of the satellite by observing the azimuth and brightness of the star, and the accuracy can reach the arc-second level after querying the ephemeris. The star sensor is an important part to determine the attitude information of the satellite. When the star sensor fails, it must be able to accurately locate the fault point and provide a troubleshooting plan to avoid affecting the normal operation of the satellite. Therefore, various fault conditions of the star sensor must be fully simulated and verified on the ground to provide sufficient support for the ground fault diagnosis and processing method verification of the satellite control system. ...

AI Technical Summary

Problems solved by technology

[0003] In the existing satellite control system, mathematical models are used for the relationship between sensors, actuators and satellite dynamics. The fault simulation of star sensors only uses the fault mathematical model of the sensor. First, the complexity of the fault makes it difficult to establish an accurate mathematical model. , and cannot reflect the physical representations of different fault points, and the lack of actual telemetry data of star sensors makes it difficult to guarantee the validity of fault simulations. Secondly, the faults of star sensors are mainly caused by external environments, such as the influence of space stray light, satellite Factors such as jitter cannot be realized by mathematical simulation, so the existing fault simulation methods cannot meet the needs of satellite control system ground fault diagnosis and verification of processing methods

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