Singular point judgment method based on singular geometric significance of control moment gyro group

Abstract

The invention discloses a singular point judgment method based on singular geometric significance of a control moment gyro group. The method comprises the following steps: step 1, respectively calculating a moment vector and an angular momentum vector according to a frame angle, an initial moment vector and an initial angular momentum vector; 2, calculating a quasi-singular vector according to themoment vector; 3, calculating a singular coefficient according to the quasi-singular vector and the moment vector, and judging whether the frame angle is a singular point or not; 4, if the frame angle is not a singular point, ending the judgment; If the frame angle is a singular point, calculating a judgment coefficient, judging the type of the singular point, and ending the judgment. According to the method, the problems of complex singular point judgment operation and low operation rate of different control forces for rejecting the gyro group are solved; any two moment gyroscopes in the control moment gyroscope group are selected to judge whether any frame angle of different control moment gyroscope groups is a singular point or not in a coplanar state, and the type of the singular point is determined, so that the judgment calculation amount is simplified, and the precision and reliability of a control system are improved.

Description

technical field [0001] The invention relates to the technical field of satellite control force rejection, in particular to a singular point determination method based on the singular geometric meaning of a control moment gyroscope group. Background technique [0002] With the increasing complexity of satellite missions, the requirements for satellite maneuverability are also increasing. The control moment gyro group (SGCMG) can provide a large and continuous control moment, and has a large angular momentum space, so the control moment gyro group is an ideal actuator for large-angle fast maneuvering satellites. [0003] However, the control moment gyro group will have singularity problems when solving the torque frame angle, so that the output torque does not match the command torque, so how to determine the existence of singular points in the control moment gyroscope group is very important. At present, the determination of singular points of different torque gyroscope grou...

AI Technical Summary

Problems solved by technology

This method aims to solve the problem of complex calculation and low operation rate of the singular point determination of different control force gyroscope groups, and selects the coplanar state of any two moment gyroscopes in the control moment gyroscope group to determine whether any frame angle of different control moment gyroscope groups is Singularity, and determine the type of singularity, simplify the judgment calculation, improve the accuracy and reliability of the control system

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