Transfer Trajectory Design And Analytical Predictor-corrector Entry Guidance Study For Manned Lunar Landing Mission

In the21st century, the people are interested in the exploration of the moon. Thismisson can show the power and technological strength, military strength and theintegrated strength of the tasks involved in many aspects of the preamble oftechnology of a country, attracting the attention of many scholars. In this paper, designof lunar exploration transfer-orbit and reentry guidance of the manned lunarexploration missionare introduced.Human lunar exploration activities were reviewed, and the orbit design of lunarexploration technology is detailedly investigated, different guidance laws for the Earthreentry of lunar exploration mission is comprehensive Analysed. As the basical theoryof the orbit design of lunar exploration, the time and the coordinate system definitionrequired are supplied, and then several key issues in the orbit design of the lunarexploration are analyzed.Based on the extended patched conic method, the transfer orbit of the lunarexploration is preliminary designed. Taking most constraints into account, bysearching for launching time, parking orbits glide time and the velocity increment ofthe critical point parameters, the preliminary design of the whole process of orbit fromlaunch to return and landing is obtained. The orbit of lunar exploration, which includsthe earth-moon transfer orbit and return transfer orbit of the moon, is designedrespectively.In order to adapt to the low lift-drag ratio aircraft of the large range, anatmospheric jumping reentry trajectory design based on the analytical prediction-correction guided method is designed. Atmosphere jumping reentry trajectory of theclosed analytical solution is obtained by the matched asymptotic expansion method.According to the analytical solution, forecast the remainder of the aircraft flightreal-time, and the bank angle is continuously adjusted to modulate the final placementaccuracy. At different stages of reentry flight, different guidance strategies aredesigned. The simulation results prove the effectiveness of this method.