Pilot Study On Star Image Processing And Design Of The Integrative Combinative Navigation's Circuit

It is an important trend to develop integrative and miniaturized Star Light /Inertia Combinative Navigation System in the area of Star Light Navigation which is also the difficult problem in the application area of our nation's navigation. For the star image processing and the design of navigation's hardware are both the key technology of Star Light /Inertia Combinative Navigation System, so it is of high engineering value to do research on them.The paper's work mainly contains the pilot study on star image processing and the design of the integrative combinative navigation's circuit. The former part, including the analysis, development and simulation of each arithmetic which composes of star image process, will be introduced in the chapter 2 and chapter 3;the latter part, including the design of PCBs and the communication management system, will be described in the chapter 4 and chapter 5 .The paragraphs of this paper are organized as follows:Chapter 1: The principle, current status and trend of Star Light Navigation were briefly described, and the content, meaning as well as the innovations of the work was presented.Chapter 2: The noise characteristic of the CCD camera was analyzed, and the principle and the effect of the wiener filter were clarified. Meanwhile, the composing, principle, arithmetic realization and simulation of the star image division arithmetic and the fake star identification arithmetic were described in detail.Chapter 3: The composing, arithmetic realization and simulation of the table-inquiry Gauss fitting subpixel location and the double time verify identification arithmetic based on multiple dimension triangle vector were presented in detail.Chapter 4: The components' design of the integrative Combinative Navigation circuit board were described systematically, including the entire framework of integrative circuit board, power supplying subsystem , the structure's hierarchy of the PCBs, the simulation of signal integrality and the design result of the PCBs.Chapter 5: The design of communication management system and the FPGA realization were given in detail which contains the design of the entire framework, the outer communication management unit, the SPI communication management module between PCBs, the general control unit and the realization of the whole system.Chapter 6: Summary and expectations for the research in the paperInnovations of this paper lie in: putting forward a new fake star identification arithmetic which combines inquiry matching with the correlation computing of single point and using the conversion arithmetic of star image's one dimension array to simplify the description of star's relative location; creating a named inquiry-table Gauss fitting arithmetic which is of high precision and can be rapidly located.