Marine Map Simulation Research Of Star Sensors

Sensitive instruments have these characteristics of tamper-proof,autonomous navigation and space,the adaptive ability is strong,it can provide vector quasi accurate position and attitude information,and has a very wide application in the air,sea and land.Map simulation method is a feasible way to detect the performance of star sensor,complete simulation tests on land,it is concluded that effective simulation map,and to make a evaluation on the algorithm of star map identification and selection of navigation star intuitive detection.Simulation method in this paper,the map to simulate the phenomenon of image distortion and motion blur has carried on the detailed analysis and give the effective solution to the problem of motion blur,the simulation experiment using the gaussian model simulation imaging,and solved the problem of the surface performance of star sensor detection.First of all,the star sensor positioning and appearance are accomplished by stars by the coordinate transformation of known location information in this paper,so the first on the celestial sphere coordinate system and a two-dimensional image plane coordinate system,like space coordinate system and the factors influencing the star place four aspects carries on the detailed introduction,lays the foundation for further study on the face after celestial bodies.Introduction of star sensor attitude algorithm related methods of the euler Angle and quaternion used for carrier attitude.Secondly,according to the simulation of star imaging principle,analyzes the characteristics and the magnitude of the stars to the gray level and the transformation of the relationship between filming of star sensor,the more suitable for the map simulation of gaussian gray-scale imaging model of diffusion model as a star.And may be produced in the process of map shows the geometric distortion of posterior correction method is used to solve.Considering star star sensor will be affected by the interference of atmospheric refraction,this article based on the reference vector refraction correction method of the star.And under the state of uniform motion in a straight line motion blur problem has carried on the modeling and simulation,the simulation results show that image recovery effect is good,and it is relatively close to the original image.Finally,using spiral datum algorithm combined with Microsoft Access database software to map needed in the process of simulation of the navigation star database of star selection and preparation,and in view of the star data storage way to simulate the effects of time used to map is analyzed.Using Microsoft Visual C+ + software to map simulation software to carry on the design,and has made the detailed analysis of the various modules,using the MFC class library in software simulation software user interface design map reduced the workload of the user.Select the background noise figure of the discussion,at the end of the simulation of variance of different background noise image,it made morerealistic simulation of the map.