A phased array digital transmission guidance control method based on on-board real-time planning

Abstract

The invention relates to a phased array data transmission guide control method based on onboard real-time planning and relates to the field of spacecraft attitude determination and control. The method realizes a function of achieving fast data transmission after imaging of micro satellites and performing data transmission while imaging. The method comprises the following steps: if an imaging mode is used, setting the imaging priority and the data transmission priority as 1 and 0 respectively; if data transmission is simultaneously performed by two data transmission stations, ranking the priorities of the digital transmission stations, setting the priority of the digital transmission station with high priority as 1 and the other one as 0; if a single data transmission station performs the data transmission, setting the priority of the data transmission station as 1; calculating the expected orientation, the azimuthal angle and the off-axis angle of a phased array antenna; if the off-axis angles satisfies a constraint condition, requiring no posture maneuver, otherwise, setting a mode with a priority of 1 as dominant; and in the case of the mode with a priority of 1 as dominant, if the off-axis angle satisfies the constraint condition, enabling the satellite not to require attitude maneuver, otherwise using the data transmission station with high priority as an expectation and enabling the phased array antenna to point to a target point by controlling the attitude of the satellite. The method can realize fast data transmission and data transmission during imaging.

Description

technical field [0001] The invention relates to the technical field of spacecraft attitude determination and control, in particular to a phased array digital transmission guidance control method based on on-board real-time planning. Background technique [0002] For the tracking and control of ground antennas, since microsatellites use off-the-shelf ground station equipment, when performing data transmission applications, it is necessary to design an effective solution for each data transmission station. Therefore, it will be more convenient and quicker to carry out data transmission control by changing the attitude of the micro-satellite or to calculate the corresponding on-board antenna control command according to the attitude of the micro-satellite. Aiming at the problem of digital transmission control of ground points, the existing robust controllers are generally used, but the earth model used in the calculation process of ground point coordinates is a spherical model,...

AI Technical Summary

Problems solved by technology

Aiming at the problem of digital transmission control of ground points, the existing robust controllers are generally used, but the earth model used in the calculation process of ground point coordinates is a spherical model, but in fact, the earth is not a regular spherical shape, therefore, It is obviously inappropriate to use the spherical model to study the digital transmission control problem of the ground point, which will affect the calculation accuracy

For the pointing problem of the antenna, the corresponding control algorithm is generally used to solve the problem, but it is only for the situation when the target point exceeds the range of the antenna, and it is not applicable for the case where the target point is not beyond the range of the antenna

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