Volume 34 Issue 7
Jul.  2008
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Jin Jing, Li Min, Song Ningfang, et al. Random modulation for fiber optic gyroscope based on four-states Markov chain[J]. Journal of Beijing University of Aeronautics and Astronautics, 2008, 34(7): 769-772. (in Chinese)
Citation: Jin Jing, Li Min, Song Ningfang, et al. Random modulation for fiber optic gyroscope based on four-states Markov chain[J]. Journal of Beijing University of Aeronautics and Astronautics, 2008, 34(7): 769-772. (in Chinese)

Random modulation for fiber optic gyroscope based on four-states Markov chain

  • Received Date: 11 Jun 2007
  • Publish Date: 31 Jul 2008
  • Electrical crosstalk from modulation signal deteriorates bias stability, dead band and linearity in digital closed-loop fiber optic gyroscope (FOG). A random modulation based on a four-states Markov chain was presented to attenuate the electrical crosstalk. With periodicity of sine function and equiprobability of state transition direction, the four-states Markov chain can generate two signals statistical independently, a demodulation signal and a modulation signal, and the demodulation signal is a zero-mean stochastic sequence with the value of -1 and 1 equiprobablely. So the electrical crosstalk from the modulation signal can be attenuated via correlation with demodulation signal. The random modulation was implemented by using state machine in field programmed gate array (FPGA). Simulation and experimental results indicate that the random modulation based on the four-states Markov chain can attenuate the electrical crosstalk from the modulation signal by 1×103 times, and improve bias stability, dead band and linearity of FOG.

     

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  • [1] Lefevre H C. The fiber-optic gyroscope [M]. London:Artech House, 1993 [2] 潘军.闭环光纤陀螺的死区现象及克服死区实验[J].航空学报,2001, 22 (2):177-179 Pan Jun. Dead band phenomena of closed-loop fiber optic gyroscope and the experiment to eliminate dead band [J]. Acta Aeronautica et Astronautica Sinica, 2001, 22 (2):177-179 (in Chinese) [3] Pavlath G A. Closed-loop fiber optic gyros Rric Udd, Lefevre H C, Kazuo Hotate, et al. Fiber Optic Gyros:20th Anniversary Conference. Denver:SPIE, 1996:46-60 [4] Spahlinger G. Error compensation via signal correlation in high precision closed-loop fiber optic gyros Rric Udd, Lefevre H C, Kazuo Hotate, et al. Fiber Optic Gyros:20th Anniversary Conference. Denver:SPIE, 1996:218~227 [5] 毛彩虹,王冬云,舒晓武,等.伪随机调制在全数字闭环光纤陀螺中的应用[J].光电工程,2002, 29(Sup):80-83 Mao Caihong, Wang Dongyun, Shu Xiaowu, et al. Application of pseudo-random modulation in full-digital closed-loop optic fiber gyroscope [J]. Opto-Electronic Engineering , 2002, 29(Sup):80-83 (in Chinese) [6] 张晞,潘雄,张春熹.光纤陀螺随机调制的理论分析及实验[J].北京航空航天大学学报,2006, 32 (2):195-198 Zhang Xi,Pan Xiong,Zhang Chunxi. Theory analysis and experiment of random modulation in FOG [J]. Journal of Beijing University of Aeronautics and Astronautics, 2006, 32 (2) :195-198 (in Chinese) [7] Zepernick H J, Filger A. Pseudo random signal processing theory and application [M]. Chichester:John Wiley & Sons, Ltd, 2005 [8] Meerschaert M M. Mathematical modeling [M]. USA:Elsevier Science, 1999:227-249
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