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Star sensor and gyroscope combined calibration method suitable for Mars detection

A star sensor and joint calibration technology, applied in the direction of instruments, measuring devices, etc., can solve the problems of unfixed attitude reference, star sensor and gyro joint calibration, etc. reliability effect

Active Publication Date: 2020-05-29
SHANGHAI AEROSPACE CONTROL TECH INST
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Problems solved by technology

For Mars exploration missions, the attitude reference is not fixed, and it is impossible to perform joint calibration of star sensors and gyroscopes like near-Earth satellites

Method used

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  • Star sensor and gyroscope combined calibration method suitable for Mars detection
  • Star sensor and gyroscope combined calibration method suitable for Mars detection
  • Star sensor and gyroscope combined calibration method suitable for Mars detection

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Embodiment Construction

[0029] The invention discloses a joint calibration method of a star sensor and a gyroscope suitable for Mars exploration, so that the Mars probe can complete the joint calibration of the star sensor and the gyroscope under any attitude reference in the whole life cycle. During the steady-state flight of the Mars rover, a calibration algorithm is constructed under the inertial reference based on the measurement model of the star sensor and gyroscope.

[0030] like figure 1 As shown, a kind of star sensor and gyroscope joint calibration method suitable for Mars exploration proposed by the present invention comprises the following steps:

[0031] (1) Judging whether the star sensor data of each shot is valid, if the star sensor data is invalid, the calibration calculation is no longer performed when the shot is taken; if the star sensor data is valid, then enter step (2);

[0032] The condition for the star sensor data to be valid is that the star sensor mode is in star tracking...

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Abstract

The invention discloses a star sensor and gyro combined calibration method suitable for Mars detection, and a Mars detector is allowed to complete the combined calibration of the star sensor and the gyro under any attitude reference in a full life cycle. In the steady-state flight process of the Mars detector, a calibration algorithm is constructed under the inertial reference according to measurement models of the star sensor and the gyroscope. Compared with the prior art, the star sensor and gyroscope combined calibration method suitable for the Mars detection has the advantages that the Mars detector can perform combined calibration of the star sensor and the gyroscope in any attitude in an inertial space, the calibration arc section is improved, and the reliability of the combined calibration of the star sensor and the gyroscope is improved.

Description

technical field [0001] The invention relates to a joint calibration method of a star sensor and a gyroscope suitable for Mars exploration, which is used for the joint calibration of a star sensor and a gyroscope in the whole flight process of a Mars probe, and is suitable for the star sensor and a gyroscope in any inertial attitude of the Mars probe. Gyro joint calibration requirements. Background technique [0002] On-orbit Mars probes use star sensors to directly determine the inertial attitude of the probe, and use gyroscopes to directly measure the angular velocity of the probe relative to the inertial system. However, there are random errors in star sensor measurement and constant drift in gyroscope. Therefore, in order to ensure the attitude measurement and control accuracy, it is necessary to suppress the random error in star sensor measurement on the one hand and compensate for the constant drift of gyroscope on the other hand. [0003] The working mode of near-Eart...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C25/00
CPCG01C25/005
Inventor 刘付成肖东东唐文国张超操宏磊陆丹萍
Owner SHANGHAI AEROSPACE CONTROL TECH INST
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