A test injection method of an earth-moon transfer orbital engine

Abstract

The invention discloses an earth-moon transfer orbit engine trial injection method. A midway correction strategy and trial injection requirements are jointly designed, and the engine trial injection requirements are met according to the optimal propellant principle on the premise of ensuring the near-moon point state of a transfer orbit. Engine trial injection is combined with midway correction ofearth-moon transfer, according to the position and speed data of the earth-moon transfer orbit at a certain moment, the midway correction control quantity is calculated, and the proper trial injection opportunity and strategy are determined in combination with the trial injection requirement of the engine, so different error conditions can be covered, the transfer track terminal target requirement and the trial injection requirement of the engine can be met at the same time, and good engineering operability is achieved.

Description

technical field [0001] The invention relates to the technical field of deep space exploration track design, in particular to a method for determining the timing and strategy of the test injection of an Earth-Moon transfer track engine. Background technique [0002] In the lunar exploration mission, after the probe is directly sent into the earth-moon transfer orbit by the launch vehicle, it is necessary to carry out a test spraying of the high-thrust orbital control engine during the transfer flight to verify the performance of the high-thrust engine and ensure that the subsequent near-term Reliability and safety of important orbit change events such as monthly braking. However, orbital control engine test spraying generally has a minimum duration requirement. In the case of high launch and orbit determination accuracy, the speed increment generated by this minimum duration is generally large. If the direct increase in the Earth-Moon transfer process An orbit change is used...

AI Technical Summary

Problems solved by technology

However, orbital control engine test spraying generally has a minimum duration requirement. In the case of high launch and orbit determination accuracy, the speed increment generated by this minimum duration is generally large. If the direct increase in the Earth-Moon transfer process One orbit change is used for engine test spraying, which will not only change the target state of the near-moon point, but also increase the difficulty of the control of the Earth-Moon transfer orbit, resulting in a shortage of flight procedures and measurement and control resources.

Images