The Research For The Star Simulation With Adjustable Spectrum

With the development of star sensor,the star simulator which is as star sensor product is also put forward the higher application requirements.At present, the domestic and abroad researches on the star simulator are mainly concentrated on the single-magnitude star simulator or multi-magnitudes and single-spectral star simulator,Less research on the spectral characteristics of stars and the star simulator light source system is calibrated by manual,Moreover the calibration cycle is long,and the light source stability is not very good,and its application is limited.Therefore,it is necessary to develop an automatic calibration star simulator whose spectrum are adjustable to meet the diverse application requirements of star sensors currently.This paper regards the alterable spectrum star simulator as a research background.The realization of light source system which is attached to the alterable spectrum star simulator is analyzed and studied carefully.Thus,the paper is mainly developed from the following aspects:First of all,Study and analyze about the star simulator at home and abroad,Learn about the relevant research project before,Embarking from the basic knowledge of luminosity and colorimetry,the paper proposes a practical method of star simulator source system in which the white LED light sources are regarded as the main body,a plurality of monochrome LED light sources are used to compensate the spectra based on the least squares method.And use the MATLAB to test and verify this method by the theoretical and experimental simulation.Secondly,the star simulator source system is designed and completed by using the double integrating spheres.At the same time,put to use VC++ to write the source system control software to accomplish the automatic simulation and stable export of the target spectra.In the laboratory,the whole light source system are fitted together and debugged,Moreover the total alterable spectrum star simulator is formed by combining the source system with the corresponding optical system.Finally,the whole system accuracy and stability testings are carried out in the laboratory.The test results are analyzed and this study is improved by related experiments combined with the problems which are catched sight of in the process of working.At the end of the paper,Summarize the experiences and lessons,and the further improvement measures and the prospects of the further are put forward to the following job.