Star sensor suitable for Mars detection and gyro on-orbit combined use method

Abstract

The invention relates to a star sensor suitable for Mars detection and a gyro on-orbit combined use method, and relates to the field of Mars detector star sensor and gyro use. The method comprises: performing fault diagnosis on the four star sensors with different priorities in sequence, and judging whether a gyroscope needs to be used for outputting the attitude of the Mars detector or not; whenthe gyroscope is used for outputting the posture of the Mars detector, restarting the four star sensors in sequence according to the priority in real time, and achieving troubleshooting; when the starsensor with faults removed exists, switching the attitude of the Mars detector output by the star sensor in real time; keeping the attitude of the Mars detector output by the gyroscope after the starsensor with no troubleshooting is determined. According to the method, in the whole flight process of the Mars probe, the star sensor can be automatically diagnosed and reconstructed and has the automatic restart capacity after all faults occur, and gyro integration is automatically switched to provide high-precision attitude information under the condition that no star sensor is available.

Description

technical field [0001] The invention belongs to the field of use of a star sensor and a gyroscope of a Mars probe, and relates to an on-orbit combined use method of a star sensor and a gyroscope suitable for Mars exploration. Background technique [0002] During the whole process of flight, the Mars rover needs to perform attitude measurement to control the set mission. [0003] There is no experience in Mars exploration in China, and the earth satellite is easy to operate on the ground. However, for the Mars probe, it has the characteristics of long distance between the device and the ground and large communication delay. Simply learning from the star sensor processing method of the earth satellite has the characteristics of insufficient real-time performance. In order to improve the high-precision attitude measurement of the Mars ring probe Reliability requires independent fault diagnosis, reconstruction, and power-off and restart operations on the star sensor. [0004] ...

AI Technical Summary

Problems solved by technology

However, for the Mars probe, it has the characteristics of long distance between the device and the ground and large communication delay. Simply learning from the star sensor processing method of the earth satellite has the characteristics of insufficient real-time performance. In order to improve the high-precision attitude measurement of the Mars ring probe Reliability, it is necessary to independently perform fault diagnosis, reconstruction, and power-off and restart operations on the star sensor

[0004] In addition, considering that the star sensor can eliminate most of the faults by powering off and restarting, and as the distance between the deep space exploration mission and the earth is getting farther and farther, there is currently no combination of a star sensor and a gyroscope suitable for Mars exploration. Strategy

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