Research On Optical Imaging Simulation In Small Celestial Bodies Impacting Exploration

The exploration of deep space plays an important role for human beings to understand the origin and evolvement of the universe. With the development of deep space exploration, countries of the world have begined to explore the asteroids. It is a key technology to test the projects in ground in manner of visualization simulation. In this thesis, technologies of optical imaging simulation are in-depth researched and some significant results are achieved. The major production the thesis researches and main innovation are presented as follows:1.Geometrical optics, radiant and electro-optical theories are discussed ,Geometrical and radiant model of optical imaging established and simplified, following photogrammetric and optical principles.2.Simulating algorithms of optical imaging are analyzed and researched, a method of full-lens based physical model is put forward. Relative parameters of the camera are simulated with the OpenGL application programming interface. By integrating rendering to textures and graphic hardware programming technologies, some physical effects of camera are realized on the basis of digital image processing and optical system theories, Traditional CPU based programming algorithms for image processing are simplified and accelerated, the render efficiency is effectively raised. Wrinkled and small-range subtle physiognomies are designed and realized by combining with bump mapping and multi-textures mapping technologies.3.In-depth researches are made for simulating the results of impacting on the basis of physical models. A simple torus model is established to simulate the spreading of shock wave. Methods are researched on solving and simplifying the hydromechanical equation, and based of which, an accelerated algorithm of three-demission smoke on the basis of GPU is put forward, and the problem that complicated physical calculation is short of real time is solved to raise the render efficiency. Aiming at the issue that traditional particle systems based on texture mapping are lack of reality, an advanced particle systems which based three-demission particles model is brought forward, which result in real time simulation of splash objects.4.An archetypal system that simulating the optical imaging of small celestial bodies is designed and programmed, a flat roof with better functions, steady capability and real time characteristics is established for imaging simulation, which has get better application effects.