Multi-probe star sensor data transmission fault monitoring and autonomous recovery method

Abstract

The invention provides a multi-probe star sensor data transmission fault monitoring and autonomous recovery method. The method comprises the following steps that S1, each header monitors a state of communication between the header and a circuit box in a frame period, generates a header communication status word and sends the header communication status word to the circuit box; S2, the circuit boxjudges whether data sent by each header in the frame period is normally downwards transmitted to the circuit box or not, generates a status word of downwards transmitting the data of the header to thecircuit box, acquires a working state of receiving an instruction head by the circuit box in the frame period, and generates a work status word of the circuit box; S3, the circuit box stores the status word of downwards transmitting the data of each header to the circuit box, the work status word of the circuit box and the received header communication status word in a multi-probe star sensor working state memory; and S4, a CPU reads the data of the multi-probe star sensor working state memory and judges whether data transmission of each header and the circuit box is normal or not, and when the header is judged to have a fault, the CPU controls the header to be autonomously powered off or on.

Description

technical field [0001] The invention relates to the field of star sensor monitoring and control, in particular to a multi-probe star sensor data transmission fault monitoring and autonomous recovery method. Background technique [0002] The star sensor is currently the most accurate attitude measurement device on various spacecraft, and it is also the key sensor of the astro-inertial integrated navigation system. Due to the limitations of the working mechanism and structure, the traditional star sensor has several deficiencies: first, its three-axis attitude measurement accuracy is inconsistent; second, the attitude cannot be continuously output due to the interference of ambient stray light. At present, the method of installing multiple star sensors on spacecraft is generally used to overcome the above shortcomings. This method improves the accuracy of three-axis attitude determination by fusing the attitudes of each star sensor. However, for high-precision attitude determ...

AI Technical Summary

Problems solved by technology

Due to the limitation of working mechanism and structure, the traditional star sensor has several deficiencies: first, its three-axis attitude measurement accuracy is inconsistent; second, due to the interference of ambient stray light, it cannot continuously output attitude

[0005] During the operation of the star sensor, when the data transmission between the head and the line box is affected by external interference or the data transmission is abnormal due to the failure of the spacewire communication interface, the multi-probe star sensor will work abnormally

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