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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2017, Vol. 38 ›› Issue (4): 320574-320574.doi: 10.7527/S1000-6893.2016.0261

• Material Engineering and Mechanical Manufacturing • Previous Articles     Next Articles

Lunar module trans-lunar window searching approach for manned lunar mission

HE Boyong, LI Haiyang   

  1. College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, China
  • Received:2016-06-30 Revised:2016-09-26 Online:2017-04-15 Published:2016-10-08
  • Supported by:

    National Natural Science Foundation of China (11372345, 11402295); National Basic Research Program of China (2013CB733100)

Abstract:

An accurate and rapid approach to lunar module (LM) trans-lunar injection (TLI) window and orbit parameter design is derived for manned lunar landing mission based on low lunar orbit coplanar rendezvous and docking (RVD). The pattern that astronauts are separated from cargo is adopted. LM arrives at the lunar coplanar RVD orbit earlier than the crew exploration vehicle (CEV). LM completes the braking on the LLO RVD plane with only one impulse at perilune. A strategy of three-level cascade searching for LM TLI windows is proposed. The month window and orbital initial parameters of TLI are obtained in the first level. Further initial solution for month window and orbital parameters are obtained with an improved double two-body analytic model in the second level. The high precision dynamics solution for zero window and orbital parameters are optimized by SQP_Snopt algorithm. Simulation results show that the rapid and accurate three-level cascade searching approach for LM TLI windows and orbital parameters is effective for manned lunar landing mission. The influential factors and fundamental patterns of TLI window are revealed to supply references to China's manned lunar landing mission in the future.

Key words: manned lunar landing, lunar module (LM), low lunar orbit rendezvous, trans-lunar window, cascade searching

CLC Number: