Star sensor external field conversion reference measurement system and star sensor external field conversion reference measurement method

Abstract

The invention relates to a star sensor external field conversion reference measurement system and a star sensor external field conversion reference measurement method. The system comprises a star sensor 1, an astronomical north theodolite 2, a theodolite A3, a theodolite B4, a global positioning system (GPS) antenna 5, a GPS receiver 6, a gas pressure temperature sensor 7 and a control computer 8;the method uses the system provided by the invention; the method applies the fixed stars as a measurement reference to determine the conversion relationship between a measurement coordinate system ofthe star sensor and a reference prism coordinate system. The system and the method avoid the estimation error caused by the parameter coupling, of parameters such as a principal point in a calibration process of the star sensor in the traditional laboratory test method. The measurement accuracy of the conversion reference is effectively improved. The method is widely applicable to the determination of external lead-out references for various types of star sensors.

Description

technical field [0001] The invention belongs to the field of astronomical navigation, and in particular relates to a star sensor external field conversion reference measurement system and method. Background technique [0002] Regarding the star sensor conversion reference measurement method, there are no patents with public reports. [0003] The star sensor is a navigation device with a high degree of autonomy. It measures the attitude information of the carrier by comparing the observation vector of the star point in the field of view with the reference vector in the astronomical star catalog. In the actual measurement process, what the star sensor directly obtains is the relationship between its measurement coordinate system and the reference coordinate system. The measurement coordinate system is established on the photodetection component, without explicit externalized features. [0004] A hexahedron is generally used to transmit the attitude measurement results of the...

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Problems solved by technology

[0007] The object of the invention is to: overcome the deficiencies in the measurement accuracy of the traditional star sensor conversion reference measurement method affected by the experimental calibration process parameter coupling problem, and propose a star sensor external field conversion reference measurement method

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