Study On Technology Of Ambient Intelligence For Lunar Surface Using Laser Scanners

Technology of ambient intelligence for Lunar Surface is one of the most important parts in the national project of probing moon. It provides basal information not only to the navigation system, but also to path programming system of the unpiloted exploration vehicle. It's the target of this paper to research technology of Ambient Intelligence adapted to the lunar surface, which based on the information from a laser scanner.Researching of ambient intelligence is a huge and complex project, and the emphases parts of this paper are the objects identification and the environment space rebuilding based on the data sourcing the scanner. On the lunar surface, the objects needed to identify are the lunar surface, stones, dunes and annular holes.By the theories in the data processing and model identification, the paper discussed two methods to deal with:First one is based on coordinates, which is under the condition of the relationship between the scanner and the real space is known, and the real coordinates of the points scanned are known. With the methods of K-W Detection and Principal Components Analyses, get two kinds of characteristic to classify the data. By the two kinds of characteristic, the surface points'data can be drawn out. The unpiloted vehicle will land a flat area on the lunar surface, so the largest species is composed of the surface points scanned by the K-means clustering method. Then making use of the space relation between the other objects and the surface, the system can identify all of them. After the processing of the drawing, it can be summarized that the range of the lunar surface. A new arithmetic that combines the range and K-means can improve the program's efficiency;The second one is based on the angles, and the relationship between the scanner and the real space could be unknown. Transforming the points'coordinates to intersection angles with a flat, it turns the coordinates'clustering to the angles'clustering. When two planes intersect, the intersection angle between them is fixed value. Based on this theorem and the angles transformed, the"unreal"points'data can been clustering. The whole data space is cut many sections so that it can be avoided of the error and improved the precision. The processing soon is just like the first condition.For providing details of the objects and space information to navigation system, it is necessary to rebuild the 3D space of lunar surface scanned on computer. This ambience intelligence rebuilds the space in C\C++ language. Method of least squares is chosen to simulate and rebuild the lunar surface's curve on the computer's screen at the different coordinate systems. Because of the uneven scatter of the surface's points scanned, it is low power to simulate the curve by method of the least squares, especially the direction of the distance.The paper is about research technology of ambient intelligence for lunar surface, which's source is laser scanners. It costs so much time and energy on the data processing and experimentation analysis, and gets the satisfactory outcome, so it is proved worthiness. The research of technology of ambient intelligence is a huge and complex subject, and it needs a great deal of experiments and precise ponder. I just do my best work in my master's term, and the shortages can't be avoided. I hope my research and paper could provide material and some methods to the studying and the ones would study it in this area.This subject will be more and more perfect surely, I believe.