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题名:
Analyze and experiment on AC magnetic field's effect to fiber optic gyroscopes in compact stabilization control systems
作者: Zhang, Chao1,2; Mao, Yao1,2; Tian, Jing1,2; Li, Zhijun1,2
出版日期: 2015
会议名称: Proceedings of SPIE - The International Society for Optical Engineering
会议日期: 2015
学科分类: Bandwidth - Control systems - Design - Digital storage - Electric machine control - Fiber optic sensors - Fiber optics - Fibers - Frequency shift keying - Magnetic fields - Magnetism - Optical fibers - Position control - Signal processing - Single mode fibers - Stabilization
DOI: 10.1117/12.2203287
中文摘要: Fiber optic gyroscopes (FOG) are getting more and more attention in areas such as stabilization control systems as they are all solid state and have a wide bandwidth. In stabilization systems that require wide bandwidth control, motors are usually used as actuating mechanism for active disturbance restrain. Voice coil motors (VCMs) are usually used in compact stabilization systems that require large torque and fast response. However, AC magnetic field, which can affect the output of FOG due to Faraday effect, will be generated during operation of VCMs. The frequency range affected by the AC magnetic field to the FOG's output is the same as VCMs drive signal frequency range, which is also exactly the stabilization system's working range. Therefore the effect of the AC magnetic field to FOGs must be evaluated to verify the feasibility of a stable system design that uses both FOGs and VCMs. In this article, the basic structure and operating principle of stabilization system is introduced. The influence of AC magnetic field to FOG is theoretically analyzed. The magnetic field generated by VCMs is numerically simulated based on the theory deduction of the magnetic field near energized wires. To verify the influence of the VCM generated magnetic field to the FOGs in practical designs, a simplified random fiber coil model is built for it's hard to accurately test the exact polarize axis's twisting rate in a fiber coil. The influence to the FOG's output of different random coil model is simulated and the result shows a same trend that the influence of the VCM's magnetic field to the FOG is reduced as the distance between the VCM and the FOG increasing. The influence of a VCM to a FOG with the same parameters is experimentally tested. In the Fourier transformed FOG data the same frequency point as the VCM drive signal frequency can be read. The result fit simulated result that as the distance increases, the influence decreases. The amplitude of the frequency point is just above the average noise spectrum amplitude of the tested FOG and that indicates the influence of the particular VCM's AC magnetic field to the FOG's output is negligible in this design. The feasibility of the future design can also be tested in the same way as the article introduced. © 2015 SPIE.
英文摘要: Fiber optic gyroscopes (FOG) are getting more and more attention in areas such as stabilization control systems as they are all solid state and have a wide bandwidth. In stabilization systems that require wide bandwidth control, motors are usually used as actuating mechanism for active disturbance restrain. Voice coil motors (VCMs) are usually used in compact stabilization systems that require large torque and fast response. However, AC magnetic field, which can affect the output of FOG due to Faraday effect, will be generated during operation of VCMs. The frequency range affected by the AC magnetic field to the FOG's output is the same as VCMs drive signal frequency range, which is also exactly the stabilization system's working range. Therefore the effect of the AC magnetic field to FOGs must be evaluated to verify the feasibility of a stable system design that uses both FOGs and VCMs. In this article, the basic structure and operating principle of stabilization system is introduced. The influence of AC magnetic field to FOG is theoretically analyzed. The magnetic field generated by VCMs is numerically simulated based on the theory deduction of the magnetic field near energized wires. To verify the influence of the VCM generated magnetic field to the FOGs in practical designs, a simplified random fiber coil model is built for it's hard to accurately test the exact polarize axis's twisting rate in a fiber coil. The influence to the FOG's output of different random coil model is simulated and the result shows a same trend that the influence of the VCM's magnetic field to the FOG is reduced as the distance between the VCM and the FOG increasing. The influence of a VCM to a FOG with the same parameters is experimentally tested. In the Fourier transformed FOG data the same frequency point as the VCM drive signal frequency can be read. The result fit simulated result that as the distance increases, the influence decreases. The amplitude of the frequency point is just above the average noise spectrum amplitude of the tested FOG and that indicates the influence of the particular VCM's AC magnetic field to the FOG's output is negligible in this design. The feasibility of the future design can also be tested in the same way as the article introduced. © 2015 SPIE.
收录类别: SCI ; Ei
语种: 英语
卷号: 9679
ISSN号: 0277-786X
文章类型: 会议论文
页码: 96791B
Citation statistics:
内容类型: 会议论文
URI标识: http://ir.ioe.ac.cn/handle/181551/7429
Appears in Collections:光电工程总体研究室(一室)_会议论文

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作者单位: 1. Institute of Optics and Electronics, Chinese Academy of Science, Chengdu, China
2. Key Lab of Optical Engineering, Chinese Academy of Sciences, Chengdu, China

Recommended Citation:
Zhang, Chao,Mao, Yao,Tian, Jing,et al. Analyze and experiment on AC magnetic field's effect to fiber optic gyroscopes in compact stabilization control systems[C]. 见:Proceedings of SPIE - The International Society for Optical Engineering. 2015.
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