CAJ | 학술논문

为了实现大气湍流参数的实时估计,提出并设计了一种基FPGA和DSP技术的自适应光学系统在线大气参数测量平台.该测量平台采用FPGA作为前端处理器,在自适应光学系统闭环工作时,利用多通道并行技术和流水线技术从闭环数据高速复开环泽尼克系数,采用DSP作为后端处理器,根据复的开环泽尼克系数,利用其编程灵活的特点实现大气相干长度r0、外尺度L0、风速v和相干时间t0的复杂统计运算.最后将该测量平台应用在127单元的自适应光学系统上,以实际天文恒星为观测目标,进行了大气湍流参数的测量.
위료실현대기단류삼수적실시고계,제출병설계료일충기FPGA화DSP기술적자괄응광학계통재선대기삼수측량평태.해측량평태채용FPGA작위전단처리기,재자괄응광학계통폐배공작시,이용다통도병행기술화류수선기술종폐배수거고속복개배택니극계수,채용DSP작위후단처리기,근거복적개배택니극계수,이용기편정령활적특점실현대기상간장도r0、외척도L0、풍속v화상간시간t0적복잡통계운산.최후장해측량평태응용재127단원적자괄응광학계통상,이실제천문항성위관측목표,진행료대기단류삼수적측량.
In order to realize the real time evaluation of atmospheric turbulence parameters, a real time measurement platform for adaptive optics (AO) system based on FPGA and DSP, which consisted of a front-end FPGA module and a back-end DSP module, was proposed and built. As the processor of front-end module, a FPGA was used to reconstruct the open-loop Zernike coefficients quickly from closed-loop data with the multi-channel parallel architecture and the pipelining operation. With the characteristic of flexible program, a DSP was used to calculate the back-end complex statistical values for the coherence length r0, the outer scale L0, the wind speed v and the coherence time t0. This proposed platform was applied to the 127-element AO system for the measurements of atmospheric turbulence parameters based on the observations of stellar stars.