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光纤陀螺作为新型的角度传感器,近年来发展非常迅速,在测量和制导领域得到广泛的应用。本文介绍了光纤陀螺的基本原理和分类、各类光纤陀螺的特点及国内外的发展状况,结合光纤陀螺的特点,展望了其在精确制导弹药、测试等军事领域中的应用。 相似文献
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阐述了光纤陀螺和惯性导航系统的发展历史及现状 ,详细分析了光纤陀螺产品在惯性导航系统中的地位 .同时对惯性导航系统的两大支撑技术——加速度计和全球定位系统 ( GPS)及其应用前景进行了简要的介绍 ,并且给出了最新 HARM精确制导系统的应用实例 相似文献
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再入式光纤陀螺(Re—FOG)使相互干涉的两路光循环进入光纤环,通过缩短光纤长度克服温度和应力引起的误差。本文研究了再入武光纤陀螺实用化的相关技术;提出了一种采用脉冲相位调制的信号检测方法;设计了专门的数据通讯模块。实验结果表明:所提出的信号检测方法可分离出所需循环次数的信号并解算出陀螺转速;所设计的通讯模块能保证实现陀螺与导航计算机之间的快速、稳定、准确的数据传送。再入式光纤陀螺可成为实用化的新型光纤陀螺。 相似文献
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结合GPS姿态测量系统导航的特点和光纤陀螺敏感角速度范围宽、启动速度快的特点,提出了一种光纤陀螺辅助GPS导航的方法,采用自适应滤波技术设计了组合导航算法,并进行了大量的试验,试验结果表明,利用光纤陀螺辅助GPS导航方法可行. 相似文献
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The theoretical analysis and experimental demonstration of phase modulation spectroscopy employing an all-fiber piezoelectric transducer modulator for a fiber ring resonator fiber-optic gyroscope is presented for the first time as far as we know. The results support the feasibility of such a technique as a rotation detection scheme for a resonator fiber-optic gyroscope. 相似文献
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It is shown theoretically that the excess noise of the radiation source can be compensated in a fiber-optic gyroscope with
a 3×3 ring directional coupler and a differential amplifier at the exit. This noise is one of the main factors limiting the
precision of a fiber-optic gyroscope.
Pis’ma Zh. Tekh. Fiz. 23, 36–38 (August 12, 1997) 相似文献
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A novel interferometric fiber-optic gyroscope with amplified optical feedback by an Er-doped fiber amplifier (EDFA) is proposed and theoretically investigated (the proposed gyroscope is named the feedback EDFA-FOG, FE-FOG in what follows). The FE-FOG functions like a resonant fiber-optic gyro (R-FOG) because of its multiple utilization of the Sagnac loop; however, it is completely different because a low-coherence light source is used. In addition, the gyro output signal is pulsed because the modulation frequency of the phase modulator placed in the Sagnac loop is selected to match the total round-trip time delay of the light, which includes the Sagnac-loop delay plus that of the feedback loop of the fiber amplifier. The sharpness of the output pulse can be adjusted by both the gain of an EDFA and the modulation depth of the phase modulator. When rotation occurs the peak position of the output pulse is shifted as a result of the Sagnac effect. The resolution of the rotation measurement depends on the sharpness of the output pulse. The techniques of both the open-loop and closed-loop methods are described in detail, which shows the great advantage of the proposed gyroscope over the to the conventional interferometric fiber-optical gyroscope (I-FOG). 相似文献
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The signal distortion that is due to Fresnel reflection in open-loop fiber-optic gyroscopes was theoretically analyzed to determine the relationship between the reflection ratio and the scale factor error of the gyroscopes. The analysis showed that the in-phase component of each Fourier harmonic of the gyroscope signal deviates from the true sinusoidal function, a quadrature-phase component appears, and the pi/2 rotation rates of harmonic components disagree. We evaluated the degree of scale factor degradation by defining the harmonic distortion ratio, which can be used as a measure for the reflectional quality of the gyroscopic optical system. The theory was verified by the response of an experimental gyroscope. The Fresnel reflection was eliminated by optical and electrical means, and the signal distortion of the experimental gyroscope was suppressed. 相似文献
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本文首先通过正弦波调制下干涉信号光强分析解调出光纤陀螺的输出信号,进而得出残余强度调制存在的情况下陀螺输出信号的变化情况,同时,通过分析陀螺信号的变化说明残余强度调制对光纤陀螺性能的影响与陀螺精度要求有关,精度越高,其影响越明显.其次,具体分析了数字闭环光纤陀螺受残余强度调制影响的情况下,其解调输出电压变化引起的数字阶梯高度变化,并通过残余强度调制系数与数字阶梯高度的关系式,说明了残余强度调制对光纤陀螺零偏和标度因数的影响.最后,对所得出的残余强度调制系数与光纤陀螺标度因数稳定性的关系进行了Matlab仿真,通过仿真结果,更进一步说明残余强度调制对数字闭环光纤陀螺标度因数稳定性的影响. 相似文献
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报道了一种在Y一切铁扩散LiNbO3平板光波导上制作的调频光纤陀螺用集成光学频移器。它由一对球面波导短程透镜和两个声表面波声光调制器组成。频移宽度为10MHz,调制器的中。C频率为107MHz,驱动功率为200mW。 相似文献
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It has been shown that the influence of parasitic polarization modulation on the precision of a fiber-optic gyroscope may
be reduced substantially by incorporating reflection-type phase modulators with conversion of polarization modes.
Pis’ma Zh. Tekh. Fiz. 23, 90–94 (August 12, 1997) 相似文献
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É. I. Alekseev E. N. Bazarov Yu. A. Barannikov V. P. Gapontsev V. P. Gubin I. É. Samartsev N. I. Starostin 《Technical Physics Letters》1998,24(9):719-721
A new optical system is proposed and investigated experimentally for a Sagnac fiber interferometer in which the excess noise
of the wide-band radiation source is suppressed. A tenfold improvement in the sensitivity of a fiber-optic gyroscope with
an erbium/ytterbium fiber superfluorescent light source was achieved experimentally. It is shown that the identity of the
polarization characteristics of the interferometer channels plays an important role.
Pis’ma Zh. Tekh. Fiz. 24, 30–35 (September 26, 1998) 相似文献
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V. É. Dzhashitov 《Journal of Engineering Physics and Thermophysics》1994,66(1):55-61
A mathematical model of thermal processes and temperature errors is constructed for a promising sensor to determine the angular position and angular velocity of moving objects—a fiber-optic gyroscope (FOG). Methodological, algorithmic, and program supports are developed making it possible to carry out an automatic investigation of the functioning of an FOG exposed to temperature effects. Computational experiments and computer analysis of thermal processes and thermal drift are performed for specific design versions of the FOG, and recommendations for decrease in the temperature errors of the FOG are developed.Branch of the A. A. Blagonravov Institute of Mechanical Engineering, Saratov. Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 66, No. 1, pp. 61–68, January, 1994. 相似文献