Method for converting pulse orbit transfer into limited thrust orbital transfer

Abstract

The invention belongs to the field of orbit control, and particularly relates to a method for converting a pulse orbit transfer sequence into a finite thrust orbit transfer sequence. The method comprises the following steps of: 1, determining the initial position, initial speed and initial mass of a spacecraft; 2, determining the position, the speed and the mass of the spacecraft at the pulse point; 3, according to the overall mass of the spacecraft, the specific impulse of the engine and the speed increment, determining the fuel consumption needed by orbit transfer this time; 4, determining the time required by the orbit transfer according to the fuel consumption required by the orbit transfer and the engine thrust; 5, converting the pulse quantity into finite thrust in a time period by adopting a discrete and integral mode; and 6, correcting the direction by taking the X-axis positive direction of the tnw coordinate system as a thrust direction. The accurate fuel consumption can be obtained in spacecraft orbit transfer pre-planning, the guidance precision is improved, the orbit transfer preparation cost is reduced, and the final guidance precision is improved.

Description

technical field [0001] The invention belongs to the field of orbit control, in particular to a method for converting a pulse orbit transfer sequence to a limited thrust orbit transfer sequence. Background technique [0002] With the development and deepening of space exploration activities and the rapid development of related technologies, the structure and composition of space spacecraft have become increasingly complex, and the precision and technical level of the equipment carried have improved, which also means that the cost of exploration has increased. With the emergence of new mission requirements such as emergency launch and orbit online reconstruction, the use of limited thrust orbit transfer method to study the real state of the spacecraft during the orbit transfer process, reduce the cost of pre-launch preparations and improve the final guidance accuracy is the research of orbit planning. trend. [0003] At present, the research on pre-planning of orbit transfer ...

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Problems solved by technology

[0003] At present, the research on pre-planning of orbit transfer is still dominated by pulse transfer. The sequences obtained when studying the fuel consumption law and orbit transfer time are all pulse sequences. The research of pulse transfer can obtain the sequence of spacecraft transfer from the initial orbit to the target orbit. , but the pulse amount is the ideal state assumed in the research process, and it cannot reflect the real state of the spacecraft during the orbit transfer process, mainly manifested in the deviation of fuel consumption and the deviation of guidance accuracy

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