The Star Recognition System Design Based On The Zynq-7000

As an important part of space flight instrument,astronomy-camera is produced and developed by many countries.star-sensitive camera is an high-precision and high-gesture astronomy-camera.star-sensitive camera go through three generation,and from traditional CCD star-sensitive camera to popular CMOS star-sensitive camera,they are important parts in navigation.they play key roles in aerospace and aviation.star-map distinguish arithmetic is heart technology based on star-sensitive camera.so,trustworthy,rapid,efficient star-map distinguish arithmetic is important study task.the emphasis in this article is how to achieve the arithmetic in Zynq-7000 platform.compared to DSP + FPGA architecture of star map identification system,This system is small in size, high efficiency, novel design, strong expansible, laid the foundation for later of star map identification system development.According to the characteristics of the Zynq-7000, using the method of hardware and software collaborative design under the environment of Vivado2015.2 + SDK development system.Using ARM to control the whole system, the pre-processing part of the map is completed by PL.After the completion of the pre-processing part by PL,it will send summary suspicious star, gray value to the PS through AXI bus.the PS will send coordinates of the star information to PC for display.In addition, this system use the 1553 B bus between the PC and PS Zynq to set up a communication bridge, on the one hand, Instrument can be sent by the PC machine to control the Zynq-7000, on the other hand it also can read the result of star map identification.This article mainly research in the following content:(1) In view of the traditional DSP + FPGA architecture of star map identification system,it is proposed based on Zynq-7000 platform of star map identification system;(2) PL part realize single point denoising and high-pass filtering pre-processing algorithm, PS implemented partially connected domain analysis, gray centroid calculation processing star map recognition algorithm, to solve problem of low efficiency of star map in traditional identification system;(3) Use AXI-HP high performance bus to transfer image data after PL pretreatment through the AXI DMA soft nuclear to the DDR3 SDRAM, it solved the problem of the FPGA internal storage resources;(4) The AHB bus in internal structures is used as PS and PL communicationBridges,it solved the problems suach as complex, agreement complex problems in previous communication interface between FPGA and DSP;(5) PC and star sensor communicate through the 1553 bus, realize the online update and burning function, it solves the problem of the traditional DSP program burning trouble;...