發(fā)布時間：2018-04-22 12:33

  本文選題：核磁共振陀螺儀 + 零偏穩(wěn)定性　； 參考：《中國慣性技術學報》2017年02期

【摘要】：核磁共振陀螺儀利用原子核自旋磁矩在靜磁場中進動頻率的不變性敏感載體轉動信息。針對泵浦激光頻率漂移影響核磁共振陀螺儀性能的問題,研究了泵浦激光頻率漂移影響核磁共振陀螺儀性能機理和抑制方法。通過分析核磁共振陀螺儀理論輸出的數(shù)學模型和自旋光泵極化~(129)Xe核子的過程,闡明了泵浦激光頻率波動對陀螺儀性能影響的機理。分析表明,為了獲得更高的堿金屬極化率和穩(wěn)定性,從而得到更好的陀螺儀零偏穩(wěn)定性,需要將泵浦光的頻率穩(wěn)定在~(87)Rb的原子的共振躍遷頻率處。采用波長調制法實現(xiàn)了泵浦光頻率的穩(wěn)定控制。通過實驗對比發(fā)現(xiàn):穩(wěn)頻使得陀螺儀的零偏穩(wěn)定性從389.68(°)/h(1σ)降低至40.74(°)/h(1σ),降低了89.5%。因而得出結論:抑制泵浦激光頻率的漂移可以有效提高核磁共振陀螺儀的性能,主要體現(xiàn)在陀螺儀的零偏穩(wěn)定性上。
[Abstract]:The magnetic resonance gyroscope uses the rotation information of the invariant carrier of the precession frequency of the nuclear spin magnetic moment in the static magnetic field. Aiming at the problem that the frequency drift of pump laser affects the performance of NMR gyroscope, the mechanism and suppression method of the influence of frequency drift of pump laser on the performance of NMR gyroscope are studied. By analyzing the mathematical model of the theoretical output of nuclear magnetic resonance gyroscope and the process of polarizing 129Xe nucleon with spin pump, the mechanism of the effect of pump laser frequency fluctuation on the performance of the gyroscope is explained. The analysis shows that in order to obtain higher polarizability and stability of alkali metals and obtain better stability of zero bias of gyroscopes, it is necessary to stabilize the frequency of pump light at the resonant transition frequency of the atoms of Qian87 Rb. The stable control of pump frequency is realized by wavelength modulation method. The experimental results show that the stability of zero bias of gyroscope is reduced from 389.68 (擄/ h ~ (-1 蟽)) to 40.74 (擄/ h ~ (-1) 蟽 ~ (-1)) by frequency stabilization, and the stability of gyroscope is decreased by 89.5%. It is concluded that the performance of the NMR gyroscope can be improved effectively by suppressing the drift of the pump laser frequency, which is mainly reflected in the stability of the gyroscope with zero bias.
【作者單位】： 北京航天控制儀器研究所;
【基金】：國家自然科學基金(11304007,61501015)
【分類號】：TN96

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