Terrain estimation method for lunar soft lander
A soft lander and lander technology, which is applied in the directions of instruments, two-dimensional position/course control, measurement devices, etc., can solve the problems of terrain estimation of the landing site, terrain errors, and judgment of the safe introduction timing of ranging, and achieve flight The process is stable, the guidance output is stable, and the effectiveness is guaranteed.
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[0095] image 3 The true value and estimated value of the lunar heart distance error at the end of the main deceleration section of a specific embodiment of the present invention are given. The solid line in the figure is the true value of the lunar heart distance error, and the dotted line is the estimated value. After 460s, after the lunar surface footprint of the ranging beam is within the safe voyage, the method of the present invention is used to estimate the topography, that is, the error of the lunar center distance. The final estimation result is -650m, and the estimation accuracy is better than 80m.
[0096] The simulation results verify the effectiveness of the method of the present invention.
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