Fiber optic gyroscope dynamic north-finder algorithm modeling and analysis based on Simulink

Abstract

In view of the problems such as the lower automation level and the insufficient precision of the traditional fiber optic gyroscope (FOG) static north-finder, this paper focuses on the in-depth analysis of the FOG dynamic north-finder principle and algorithm. The simulation model of the FOG dynamic north found algorithm with the least square method by points is established using Simulink toolbox, and then the platform rotation speed and sampling frequency, which affect FOG dynamic north found precision obviously, are simulated and calculated, and the optimization analysis is carried out as a key consideration. The simulation results show that, when the platform rotation speed is between 4.5 °/s and 8.5 °/s and the sampling frequency is at about 50 Hz in the case of using the parameters of this paper, the FOG dynamic north finding system can reach the higher precision. And the conclusions can provide the reference and validation for the engineering and practical of FOG dynamic north-finder.

Keywords

Fiber optics / optical fiber gyroscope / dynamic north found / modeling

References

[1] Celikel O.. Application of the vector modulation method to the north finder capability gyroscope as a directional sensor. Measurement Science & Technology, 2011, 22(22): 035203.

[2] Jiang Q. X., Chen X. B., Ma X. H., Wang H.. North seeker using single axis FOG. Journal of Chinese Inertial Technology, 2010, 18(2): 165-169.

[3] Lloyd S. W., Fan S. H., Digonnet M. J. F.. Experimental observation of low noise and low drift in a laser-driven fiber optic gyroscope. Journal of Lightwave Technology, 2013, 31(13): 2079-2085.

[4] Liu D. B., Liu J. Y., Lai J. Z.. Study of single cycle fast dynamic north seeking algorithm based on fiber optic gyroscope. Transducer & Microsystem Technologies, 2007, 26(11): 61-64.

[5] Ma H. L., Yu X. H., Jin Z. H.. Reduction of polarization-fluctuation induced drift in resonator fiber optic gyro by a resonator integrating in-line polarizers. Optics Letters, 2012, 37(16): 3342-3344.

[6] Wang L. F., Xie Y., Yang G. L., Wang Y. Y.. Error analysis of the strap-down north-finder based on the fiber optic gyroscope. Opto-Electronic Engineering, 2011, 38(5): 46-51.

[7] Yu X. H., Ma H. L., Jin Z. H.. Improving thermal stability of a resonator fiber optic gyro employing a polarizing resonator. Optics Express, 2013, 21(1): 358-369.

[8] Jin Z. H., Zhang G. H., Mao H., Ma H. L.. Resonator micro optic gyro with double phase modulation technique using an FPGA-based digital processor. Optics Communications, 2012, 285(5): 645-649.

[9] Xu H. G., Guo Z. B.. Research on rotating FOG north-finder. Piezoelectrics & Acoustooptics, 2010, 32(2): 38-41.

[10] El-Sheimy N., Hou H., Niu X.. Analysis and modeling of inertial sensors using Allan variance. IEEE Transactions on Instrumentation & Measurement, 2008, 57(1): 140-149.

[11] Jiang Q. X., Chen X. B., Ma X. H., Wang H.. North seeker using single axis FOG. Journal of Chinese Inertial Technology, 2010, 18(2): 165-169.

[12] Gou X. Q., Huang L., Liu W.. High precision north determining scheme based on FOG^bias stability. Journal of Chinese Inertial Technology, 2009, 17(3): 258-260.

[13] Wang Z. Q., Zhao J. Y., Xie M. J., Gao F. D.. Design and accuracy analysis for a fast high precision independence north-seeking. Acta Armamentarii, 2008, 29(2): 164-168.

[14] Gou X. Q., Wei J., Wang G., Liu W., Han X. Q.. Study on rate fiber optic gyroscope north-finder slop compensating arithmetic. Acta Photonica Sinica, 2007, 36(12): 2342-2345.