本文選題：數(shù)字鎖相環(huán) + 反饋控制�。� 參考：《電子與信息學(xué)報(bào)》2017年10期

【摘要】：該文針對(duì)太陽(yáng)同步軌道衛(wèi)星由于通訊誤碼導(dǎo)致衛(wèi)星時(shí)鐘不正常翻轉(zhuǎn)造成的錯(cuò)誤,提出了糾錯(cuò)策略。基于衛(wèi)星時(shí)鐘和本地時(shí)鐘授時(shí)誤差互補(bǔ)的特點(diǎn),設(shè)計(jì)了一種應(yīng)用于低頻輸入信號(hào)和大倍頻系數(shù)條件下的數(shù)字鎖相環(huán)(DPLL),利用數(shù)字鎖相環(huán)使本地時(shí)鐘跟蹤衛(wèi)星時(shí)鐘秒脈沖的相位波動(dòng),實(shí)時(shí)消除本地時(shí)鐘的累積誤差。對(duì)該時(shí)鐘源進(jìn)行了理論分析和實(shí)驗(yàn)驗(yàn)證,用現(xiàn)場(chǎng)可編程門陣列(FPGA)予以實(shí)現(xiàn)。實(shí)驗(yàn)表明,該設(shè)計(jì)實(shí)現(xiàn)的時(shí)鐘源可以實(shí)時(shí)糾正衛(wèi)星時(shí)鐘出現(xiàn)的秒脈沖不正常翻轉(zhuǎn)、秒脈沖丟失、時(shí)間包跳變、時(shí)間包丟失等錯(cuò)誤,最短可以在5個(gè)輸入時(shí)鐘周期內(nèi)進(jìn)入鎖定狀態(tài),穩(wěn)定工作時(shí)每秒累積誤差小于100μs,可作為星載光譜儀本地時(shí)鐘源使用。
[Abstract]:In this paper, an error correction strategy is proposed to solve the error caused by the abnormal turning of the satellite clock caused by the communication error code of the sun-synchronous orbit satellite. Based on the complementary error between satellite clock and local clock, A digital phase-locked loop (DPLL) applied to low frequency input signal and large frequency doubling coefficient is designed. The local clock can track the phase fluctuation of the satellite clock second pulse and eliminate the cumulative error of the local clock in real time by using the digital phase-locked loop (DPLL). The theoretical analysis and experimental verification of the clock source are carried out and implemented with FPGA (Field Programmable Gate Array). The experiments show that the designed clock source can correct the errors such as abnormal rotation of second pulse, loss of second pulse, jump of time packet, loss of time packet, etc. The shortest time can be locked in 5 input clock cycles, and the cumulative error per second is less than 100 渭 s, which can be used as the local clock source of spaceborne spectrometer.
【作者單位】： 中國(guó)科學(xué)技術(shù)大學(xué)環(huán)境科學(xué)與光電技術(shù)學(xué)院;中國(guó)科學(xué)院安徽光學(xué)精密機(jī)械研究所環(huán)境光學(xué)與技術(shù)重點(diǎn)實(shí)驗(yàn)室;上海衛(wèi)星工程研究所;
【基金】：國(guó)家自然科學(xué)基金(41275037) 安徽省杰出青年科學(xué)基金(1308085JGD03)~~
【分類號(hào)】：TN911.8;V443

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