Research on the feedback control characteristics and parameter optimization of closed-loop fiber optic gyroscope

Yan, Jingtao; Miao, Linchang; Chen, Min; Huang, Tengchao; Che, Shuangliang; Shu, Xiaowu

doi:10.1016/j.ijleo.2021.166298

Cited by 14 publications

(5 citation statements)

References 13 publications

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“…In the future, the small remaining frequency mismatch, which is less than 2000 ppm, and the Q-factor mismatch could be compensated by electrostatic tuning [ 16 , 47 ] or feedback control [ 11 , 48 ]. Considering the present remaining frequency mismatch and the limitation range of the tuning method, a reduced frequency mismatch as small as 0 could be reported [ 38 ], which can completely meet the requirement for FM gyroscopes.…”

Section: Discussionmentioning

confidence: 99%

Multi-Ring Disk Resonator with Elliptic Spokes for Frequency-Modulated Gyroscope

Wang

Chen

Tsukamoto

et al. 2023

Sensors

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In this paper, we report a multi-ring disk resonator with elliptic spokes for compensating the aniso-elasticity of (100) single crystal silicon. The structural coupling between each ring segments can be controlled by replacing the straight beam spokes with the elliptic spokes. The degeneration of two n = 2 wineglass modes could be realized by optimizing the design parameters of the elliptic spokes. The mode-matched resonator could be obtained when the design parameter, aspect ratio of the elliptic spokes was 25/27. The proposed principle was demonstrated by both numerical simulation and experiment. A frequency mismatch as small as 1330 ± 900 ppm could be experimentally demonstrated, which was much smaller than that of the conventional disk resonator, which achieved as high as 30,000 ppm.

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Section: Discussionmentioning

confidence: 99%

Multi-Ring Disk Resonator with Elliptic Spokes for Frequency-Modulated Gyroscope

Wang

Chen

Tsukamoto

et al. 2023

Sensors

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“…5 shows that the systematic error err( 1 ) falls off and the difference between Im [A w ]( = 0.002 rad) and Im [A w ]( = 0.000 rad) is getting smaller as decrease. In addition, with the aid of the closed-loop control technique(CLCT) in the automatic control system, CLCT [23,24] is widely used to accurately control the parameters of the optical elements. Therefore, we can use CLCT to consistently control the polarization of P1 to eliminate the deflection.…”

Section: Systematic Error Analysismentioning

confidence: 99%

The systematic error and the anomaly in the sensitivity and the probability of post-selection raised from the plural weak value

Huang¹,

Duan²,

Wang³

et al. 2021

Preprint

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Recently, weak value A w derived in the pre-and post-selected weak measurement has been shown to be powerful in measuring minute physical effects. In principle, the decrease in the post-selection probability will increase the sensitivity. Besides, the sensitivity which characterizes the pointer position shift is proportional to the real part of A w , and the sensitivity which characterizes the pointer shift in momentum space is proportional to the imaginary part of A w . However, we find that the relationship between the post-selection probability and the sensitivity is true when A w is a purely real number or a purely imaginary number. The plural A w will lead to the abnormal behavior where the decrease in the post-selection probability reduce the sensitivity at certain pre-and post-selection. In addition, considering the device imperfections and the environmental instability in the WVA protocol, this anomaly raised from plural A w will reduce the sensitivity and generate a systematic error of the measurement compared with the original scheme. Finally, three feasible methods are proposed to reduce these negative effects when the weak measurement inevitably changes into measurement with a plural weak value.

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“…In order to improve SLD stability, researchers have carried out a great deal of work, and many good, practical results have been achieved. These include the design of new high-temperature, low-coherence light sources and constant-temperature and constant-current control techniques, as well as SLD power detection and closed-loop control techniques [ 12 , 13 , 14 , 15 ]. Although the above methods can improve the stability of an SLD, SLD power still fluctuates at about 1%.…”

Section: Introductionmentioning

confidence: 99%

Real-Time Compensation for SLD Light-Power Fluctuation in an Interferometric Fiber-Optic Gyroscope

Zheng

Ren

Luo

et al. 2023

Sensors

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An interferometric fiber-optic gyroscope (IFOG) demodulates a rotation signal via interferometric light intensity. However, the working environments of IFOGs typically involve great uncertainty. Fluctuations in temperature, air pressure, electromagnetic field, and the power system all cause the power of the superluminescent diode (SLD) light source to fluctuate as well. In this invited paper, we studied the effects of SLD power fluctuation on the dynamic and static performance characteristics of a gyro system through the use of a light-power feedback loop. Fluctuations of 0.5 mA, 1 mA, and 5 mA in the SLD source entering the IFOG caused zero-bias stability to be 69, 135, and 679 times worse. We established an effective method to monitor power fluctuations of SLD light sources and to compensate for their effects without increasing hardware complexity or system cost. In brief, we established a real-time power-sensing and -compensating system. Experimental results showed that for every 0.1 mA increase in the fluctuation amplitude of the driving current, the zero-bias stability became 4 to 7 times worse, which could be reduced about 95% through the use of SLD power compensation.

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Research on the feedback control characteristics and parameter optimization of closed-loop fiber optic gyroscope

Cited by 14 publications

References 13 publications

Multi-Ring Disk Resonator with Elliptic Spokes for Frequency-Modulated Gyroscope

Multi-Ring Disk Resonator with Elliptic Spokes for Frequency-Modulated Gyroscope

The systematic error and the anomaly in the sensitivity and the probability of post-selection raised from the plural weak value

Real-Time Compensation for SLD Light-Power Fluctuation in an Interferometric Fiber-Optic Gyroscope

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