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Acta Armamentarii ›› 2015, Vol. 36 ›› Issue (9): 1688-1695.doi: 10.3969/j.issn.1000-1093.2015.09.013

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Hybrid Theoretical Variance Analysis for Random Error Properties of Optic Gyroscope

TANG Xia-qing, CHENG Xu-wei, GAO Jun-qiang   

  1. (Department of Control Engineering, Academy of Armored Force Engineering, Beijing 100072, China)
  • Received:2014-12-22 Revised:2014-12-22 Online:2015-11-20
  • Contact: TANG Xia-qing E-mail:chengxuwei0872@126.com

Abstract: For the sake of testing and analyzing the random error properties and identifying the noise amplitude of optic gyroscope more effectively, a new hybrid theoretical variance(TheoH) strategy is proposed to analyze the gyroscope output, which is integrated with the Allan variance and theoretical variance #1 with auto-bias removal. The problems of that the averaging time calculated with Allan variance is half of total data length and the confidence decreases at long-term averaging time are perfectly solved. A new method for analyzing the random error properties of optic gyroscope is proposed. The proposed method is compared with the Allan and theoretical variance#1, and the noise types and noise levels of white noises and real gyroscope output are identified. The experimental results show that the TheoH can improve the confidence efficiently and has higher evaluation precision than the conventional Allan method in long-term τ-values.

Key words: ordnance science and technology, inertial navigation system, optic gyroscope, theoretical variance#1, random noise

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