Study On Space Debris Collision Early Warning And Maneuver Strategy To Low Earth Orbit Spacecraft

Aiming at the fact that more debris collision risks are to the low earth orbit spacecraft in the getting worse debris environment, this paper gives a set of feasible debris early warning method and maneuver strategy, by means of which spacecraft can adopt orbit maneuver, evade dangerous objects so as to improve viability under the control of ground command and control center.In this paper, author mainly completed works as followed. First, summarized oversea collision early warning theories and orbit maneuver methods and analysed the low earth debris environment. Second, established a detailed arithmetic of collision forecast. By means of the orbit dynamics theory and other knowledge, author established mathematical model related to collision forecast, including space object orbit confirming model, space objects relative movement model, dangerous object distinguishing model and space object collision geometry relation model, etc. According to the mathematic model, author calculated the relative distance transformation rule along with time between the spacecraft and dangerous debris and established early warning rule. Third, established orbit avoidance rule and strategy. By means of confirming the geometry relation between the spacecraft and dangerous object, estimated the collisional velocity, the location of collisional point, collisional degree, established the maneuver rule. According to different anticipative collisional time and maneuver occasion, author established two maneuver mathematic model, and gave the principle and occasion executing the de-orbit and de-contrail maneuver procedure. Forth, author complied the orbit early warning and collision avoidance software. By means of early warning and collision avoidance mathematic models and theory, author developed software and completed the functional validation calculation.