Design And Implementation Of Framework And Several Key Technical Points Of Lunar Exploration Visualization Simulation System

Lunar exploration is the first step of our country’s major initiatives in deep space exploration. By realizing lunar exploration, our country will fulfil the zero breakthrough in deep space exploration. Designers can use visual simulation technology to analyze their design scheme, verifies the correctness of the design scheme before the actual detection. Visualization simulation technology can shorten the development cycle, improve designers’ work efficiency, and make the lunar exploration runs smoothly. Based on this background, we analyze and implement the key technical points, after that we put forward a set of solutions of the visual simulation system to meet the needs of analysis and design in lunar exploration.First of all, we design the architecture of lunar exploration visualization simulation system in detail, and divided it into four subsystems: detector building and editing system, lunar surface building system, lunar surface simulation system and on-orbit simulation system. In addition, we divided each subsystem into concrete modules to enhance the scalability and reusability of the system.Secondly, this paper carefully analyzes and summarizes the key points in the system, and gives a solution at the same time. These key points are: probe’s motion simulation, generating shadows of on-orbit environment and lunar surface environment and camera imaging simulation. Rigid body transformation is the essence of the probe’s motion, so we can put the probe’s motion into translation and rotation motion. According to translation matrix and rotation matrix, we can easily get the new position of the vertices, and finally complete the probe’s motion simulation. We use two deferent scheme to generate shadows in on-orbit simulation system and lunar surface simulation system. In on-orbit simulation system, we use ShadowMap and PCF(Percentage Closer Filter) to generate shadows; and in lunar surface simulation system, we use CSM(Cascaded Shadow Maps) to generate shadows. The last key point is camera imaging simulation. We find a fast way to deal with the effect of DOF(Depth Of Field) and MTF(Modulation Transfer Function) degradation, so that we can still maintain the real-time character of the system.