A Control Method for Spacecraft Formation Maintenance or Flying Evacuation

Abstract

The invention discloses a method for controlling formation maintenance or flying-around withdrawal of spacecraft. In two adjacent orbit periods of the target spacecraft, integration is performed on the x-coordinate component of the coordinate system of the main control spacecraft relative to the target spacecraft, a difference quotient of the integration result relative to the square of each corresponding period is obtained, and therefore, a period average drift velocity can be obtained; an expected period average drift velocity after the completion of formation maintenance control or flying-around withdrawal is set according to requirements, the period average drift velocity before control is subtracted from the expected period average drift velocity to obtain a period average drift velocity increment, and the horizontal components of double pulses of the formation maintenance control and single pulse of the flying-around withdrawal control both are obtained by virtue of calculation based on the increment; as a result, the formation maintenance control has the characteristics of independence, low frequentness and the like, and the lying-around withdrawal is independent, and safe and quick.

Description

technical field [0001] The invention belongs to the technical field of spacecraft formation flight guidance and control, and in particular relates to a control method for spacecraft formation maintenance or circumnavigation evacuation. Background technique [0002] In the field of spacecraft formation flight, there are generally relative motion forms such as follow-up, lead-fly and orbit-fly between two spacecraft. The relative movement of the master spacecraft around the target spacecraft in an ellipse is called orbiting, the relative movement of the master spacecraft following the target spacecraft is called follow-up, and the front is called lead flight. When the main control spacecraft enters the follow-up or lead flight state from the fly-around state for the target spacecraft, it is called the fly-around evacuation. The orbit control that keeps the movement of the master spacecraft relative to the target spacecraft within a specific range of the x-axis of the target s...

AI Technical Summary

Problems solved by technology

In the field of formation flight, there is a relative drift rate parameter in the theory of relative orbital elements developed in recent years, which is obtained by the difference between the average orbital angular velocity of the master spacecraft and the average orbital angular velocity of the target spacecraft, and maintains the control of the position of the high-orbit satellite. The concept used is called flat longitude drift rate, which is essentially the same. It is an accurate description of the drift motion trend of the relative motion configuration in the entire period. It is not convenient in actual engineering use

Images