The invention discloses a method for selecting an optimal error correction point of an earth-moon L2 point transfer orbit, which belongs to the technical field of aerospace. The implementation methodcomprises the following steps of establishing an earth-moon rotating coordinate system, and calculating an earth-moon L2 point nominal transfer orbit state transfer matrix, calculating the change condition of the error along with time according to the state transfer matrix, according to the state transfer matrix, establishing a function relationship between correction maneuver and correction timeand an orbit error, optimizing the correction time of the detector, and determining the optimal error correction point and correction speed increment of the correction speed increment and the terminalspeed increment by utilizing the function relationship, and enabling the detector to apply a speed increment at the optimal correction point to complete orbit correction of the earth-moon L2 point transfer orbit and complete earth-moon L2 point orbit transfer. According to the method, the speed increment required by correction can be minimized, and the method has the advantages of high correctionefficiency and reduction of correction fuel consumption. According to the method, the orbit transfer precision is improved by considering the influence of lunar attraction on the transfer orbit error.
本发明为公开的地月L2点转移轨道最优误差修正点选择方法,属于航空航天技术领域。本发明实现方法为:建立地月旋转坐标系,计算地月L2点标称转移轨道状态转移矩阵;根据状态转移矩阵计算误差随时间的变化情况;根据状态转移矩阵,建立修正机动与修正时间和轨道误差的函数关系;优化探测器修正时间,利用该函数关系确定修正速度增量和终端速度增量最优的误差修正点和修正速度增量;探测器在最优修正点施加速度增量,完成地月L2点转移轨道的轨道修正,并完成地月L2点轨道转移。本发明能够使修正所需的速度增量最小,具有修正效率高、降低修正燃料消耗的优点。本发明通过考虑月球引力对转移轨道误差的影响,提高轨道转移的精度。
Method for selecting optimal error correction point of earth-moon L2 point transfer orbit
地月L2点转移轨道最优误差修正点选择方法
2020-09-01
Patent
Electronic Resource
Chinese
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