Integrated optical gyroscopes(IOGs)have been an efficient tool for numerous applications in various fields,including inertial navigation,flight control,and earthquake monitoring.Here,we review the progress of integrat...Integrated optical gyroscopes(IOGs)have been an efficient tool for numerous applications in various fields,including inertial navigation,flight control,and earthquake monitoring.Here,we review the progress of integrated optical gyroscopes based on two categories of integrated interferometric optical gyroscopes(IIOGs)and integrated resonant optical gyroscopes(IROGs).展开更多
A novel all-digital scheme for open-loop fiber-optic gyroscope (POG), where only two key points of output wave were digitized directly, has been proposed. A control equation, with which the modulation depth of PZT mod...A novel all-digital scheme for open-loop fiber-optic gyroscope (POG), where only two key points of output wave were digitized directly, has been proposed. A control equation, with which the modulation depth of PZT modulator is stable when setting the modulation depth as 4.35 and a calculation equation, with which the Sagnac phase can be worked out, are derived. A modulation depth control and an automatic correlation sampling and a gain control technology were induced. A photo-type FOG was made and tested. The good performance was achieved.展开更多
From the point of view of system design, a configuration of fiber-optic interferomet- ric hydrophone array and its modulation and demodulation approach using frequncy division multiplexing technique based on Phase Gen...From the point of view of system design, a configuration of fiber-optic interferomet- ric hydrophone array and its modulation and demodulation approach using frequncy division multiplexing technique based on Phase Generated Carrier (PGC) is introduced. And the em- phasis on demonstrating the relationship among the number of units N, the detectable signal amplitude D and the detectable frequency ws through analyzing the frequency spectrum of the output signal of the J × K array and the key factor which restricts N, D, Ws for increasing are presented. The maximum phare shift and the law of its variation according to frequency are specially analyzed. The results induced from some relative theory were verified by experiments.展开更多
在干涉式光纤陀螺组成的捷联惯性导航系统中,光纤陀螺启动过程中温变效应导致的漂移项是导航误差的主要误差源,已成为限制高精度光纤陀螺系统性能进一步提升的关键因素。通过对光纤陀螺启动过程中温变效应的理论分析与建模,提出了一种...在干涉式光纤陀螺组成的捷联惯性导航系统中,光纤陀螺启动过程中温变效应导致的漂移项是导航误差的主要误差源,已成为限制高精度光纤陀螺系统性能进一步提升的关键因素。通过对光纤陀螺启动过程中温变效应的理论分析与建模,提出了一种基于查表补偿的光纤陀螺启动温变效应误差抑制法和误差评价法。实验结果表明,该抑制方法可使-40^+60℃环境下光纤陀螺漂移概率误差从0.02~0.50(°)/h降至0.01(°)/h以下,对应导航系统的导航圆概率误差从1.4~35 n mile/h降至0.8 n mile/h以下,有效抑制了光纤陀螺启动温变效应误差,提升了系统性能。展开更多
文摘Integrated optical gyroscopes(IOGs)have been an efficient tool for numerous applications in various fields,including inertial navigation,flight control,and earthquake monitoring.Here,we review the progress of integrated optical gyroscopes based on two categories of integrated interferometric optical gyroscopes(IIOGs)and integrated resonant optical gyroscopes(IROGs).
文摘A novel all-digital scheme for open-loop fiber-optic gyroscope (POG), where only two key points of output wave were digitized directly, has been proposed. A control equation, with which the modulation depth of PZT modulator is stable when setting the modulation depth as 4.35 and a calculation equation, with which the Sagnac phase can be worked out, are derived. A modulation depth control and an automatic correlation sampling and a gain control technology were induced. A photo-type FOG was made and tested. The good performance was achieved.
文摘From the point of view of system design, a configuration of fiber-optic interferomet- ric hydrophone array and its modulation and demodulation approach using frequncy division multiplexing technique based on Phase Generated Carrier (PGC) is introduced. And the em- phasis on demonstrating the relationship among the number of units N, the detectable signal amplitude D and the detectable frequency ws through analyzing the frequency spectrum of the output signal of the J × K array and the key factor which restricts N, D, Ws for increasing are presented. The maximum phare shift and the law of its variation according to frequency are specially analyzed. The results induced from some relative theory were verified by experiments.
文摘在干涉式光纤陀螺组成的捷联惯性导航系统中,光纤陀螺启动过程中温变效应导致的漂移项是导航误差的主要误差源,已成为限制高精度光纤陀螺系统性能进一步提升的关键因素。通过对光纤陀螺启动过程中温变效应的理论分析与建模,提出了一种基于查表补偿的光纤陀螺启动温变效应误差抑制法和误差评价法。实验结果表明,该抑制方法可使-40^+60℃环境下光纤陀螺漂移概率误差从0.02~0.50(°)/h降至0.01(°)/h以下,对应导航系统的导航圆概率误差从1.4~35 n mile/h降至0.8 n mile/h以下,有效抑制了光纤陀螺启动温变效应误差,提升了系统性能。
