Satellite attitude orienting system and method

Abstract

The invention relates to a satellite attitude orientation system and a method thereof. A quaternion product unit inside the system adopts a hardware description language to design a hardware circuit, and a parallel calculation module is obtained; the parallel calculation module is utilized to carry out quaternion product operation of quaternion attitude parameters q<(1)> and q<(2)>, and a quaternion attitude parameter q' of a satellite reference system O mu v omega relative to a reference system Oxyz is obtained; and satellite attitude relative to a reference object can be determined according to q'. The method comprises: controlling data flow in each part of a control data path of a state controller; generating signal for loading, reading and shifting a register; and parallelly finishingquaternion product operation. The method can greatly increase the speed of quaternion operation in the orientation system, and can determine satellite attitude relative to a reference object at faster speed; moreover, the method has good recycling property.

Description

technical field [0001] The invention relates to the field of aerospace electronics, in particular to a satellite attitude orientation system and method implemented by hardware description language for satellite applications. Background technique [0002] When a satellite performs a flight mission, there are usually predetermined requirements for the orientation of the satellite. For example, the remote sensing instrument on the earth observation satellite should be aimed at the ground, the directional communication antenna of the communication satellite should be pointed at the ground, and the astronomical telescope on the star for observing celestial bodies should be aligned with the ground. scheduled celestial bodies and more. Most of the on-board observatories and other equipment are fixed relative to the star body of the satellite, which requires the satellite to have a relative reference system, including a reference object (such as the earth, a celestial body, etc.), o...

AI Technical Summary

Problems solved by technology

[0017] At present, FORTRAN, C, C++ and other languages ​​are mostly used for satellite attitude and orientation to realize serial calculation. This implementation method has a long operation cycle. To complete a quaternion multiplication operation, it needs to perform 16 multiplications, 12 additions / subtractions and 4 results output , taking ARM as an example, each multiplication needs to perform operations such as reading from the register, and it takes 7 cycles to execute, and each addition needs to execute 5 cycles, and the output of the calculation result needs 2 cycles, so a total of 180 calculations are required to complete the multiplication and addition. cycle

In addition, this design method has low reusability, which is not conducive to the rapid design of aerospace electronic systems.

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