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Design and Analysis of Real-Time Wavefront Processor

机译:实时波前处理器的设计与分析

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Latency of wavefront processor is an important factor of closed loop adaptive optical systems. For an adaptive optical system using Shark-Hartmann wave-front sensing and point beam, by ways of task queue, subtask arithmetic decomposition and subtask structure design, a multi-processors structure based on moder parallelism theory is built to realize a pipeline of wavefront gradient, wavefront reconstruction and wavefront control. By traits of field programmable gate array(FPGA) and digital signal processor(DSP), a pipeline wavefront processor based on FPGA+DSP structure is built with highly real-time performance. Clocks of FPGA and DSP, "age" of correctors are primary sources of this wavefront processor's latency. For a 61-element adaptive optical system whose sampling frequency is 2900HZ, latency of this wavefront processor is less than 100us.
机译:波前处理器的延迟是闭环自适应光学系统的一个重要因素。对于使用Shark-Hartmann波前检测和点光束的自适应光学系统,通过任务队列,子任务算术分解和子任务结构设计,基于模型并行理论的多处理器结构建立了实现波前梯度的管道,波前重建和波前控制。通过现场可编程门阵列(FPGA)和数字信号处理器(DSP)的特征,基于FPGA + DSP结构的管道波前处理器采用高实时性能构建。 FPGA和DSP的时钟,校正的“AGE”是此波前处理器的延迟的主要来源。对于61元件自适应光学系统,其采样频率为2900Hz,该波前处理器的延迟小于100us。

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