Lunar surface landing slope distance measurement mathematical simulation method based on fine simulation terrain
A simulation method and terrain technology, applied in design optimization/simulation, 3D modeling, image data processing, etc., can solve problems such as lack of terrain, achieve the effects of avoiding terrain jumps, realistic terrain simulation effects, and improving simulation accuracy
Active Publication Date: 2020-08-18
BEIJING INST OF CONTROL ENG
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[0003] The existing mathematical simulation technology of lunar surface terrain focuses on 3D animation visual simulation and demonstration functions, and lacks the high-precision mathematical simulation of ranging sensor slant distance measurement when the distribution of craters at the landing site is diverse during the lunar landing process. support
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[0030] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0031] The present invention is based on a mathematical simulation method for measuring the slant distance of lunar surface landing based on fine simulated terrain, (1) using matlab to randomly generate fine simulated terrain near the landing point and superimposing it on the real terrain to form simulated terrain, the simulated terrain is defined in advance Grid storage; (2) Using triangle division and linear interpolation methods to calculate the elevation of the ranging beam footprint in the grid; (3) Using the elevation of the ranging beam footprint to correct the slant distance. The method of using matlab to randomly generate fine simulated terrain near the landing point proposed by the present invention can simulate the diversity of crater distribution. The elevation of any point in the grid calculated by the method of triangle ...
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The invention relates to a lunar surface landing slope distance measurement mathematical simulation method based on a fine simulation terrain, which comprises the following steps: (1) randomly generating a fine simulation terrain near a landing point by using matlab and superposing the fine simulation terrain on a real terrain to form a simulation terrain, and storing the simulation terrain according to a pre-defined grid; (2) calculating the elevation of the footprints of the ranging beams in the grids by adopting a triangular segmentation and linear interpolation method; and (3) correcting the slope distance by using the elevation at the footprint of the ranging beam. The method for randomly generating the fine simulation terrain near the landing point by utilizing matlab provided by theinvention can be used for simulating the diversity of meteorite crater distribution. According to the lunar landing slope distance measurement mathematical simulation method based on fine terrain simulation, the elevation of any point in the grid calculated through the triangular segmentation and linear interpolation method is closer to the real situation, and terrain jump is avoided, and the slope distance is corrected through the elevation of the footprints of the ranging beams, and the simulation precision of the slope distance is improved.
Description
technical field [0001] The invention relates to a mathematical simulation method for lunar landing slant distance measurement based on finely simulated terrain, and belongs to the technical field of spacecraft mathematical simulation. Background technique [0002] During the process of landing on the lunar surface, the lander needs to know its position and velocity relative to the lunar surface in real time. This function is performed by the navigation system. The ranging sensor is the key sensor of the navigation system, which measures the slant distance of the lander relative to the lunar surface, that is, the distance from the lander to the footprint of the measuring beam on the lunar surface, and is used by the navigation system to estimate the height of the lander in real time. Mathematical simulation is the main method to analyze and verify the performance of lunar lander navigation system. The fidelity of mathematical simulation directly affects the effectiveness of...
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IPC IPC(8): G06F30/20G06T17/05
CPCG06F30/20G06T17/05Y02A90/10
Inventor张晓文李骥张洪华关轶峰程铭于萍杨巍于洁王志文王华强王泽国陈尧赵宇
OwnerBEIJING INST OF CONTROL ENG