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Volume 41 Issue 9
Sep.  2015
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Journal of Beijing University of Aeronautics and Astronautics  > 2015  >  41(9): 1645-1650.
TAN Caiming, WANG Yu, SU Yan, et al. The simplest multi-position analytic alignment for SINS[J]. Journal of Beijing University of Aeronautics and Astronautics, 2015, 41(9): 1645-1650. doi: 10.13700/j.bh.1001-5965.2015.0033(in Chinese)
Citation: TAN Caiming, WANG Yu, SU Yan, et al. The simplest multi-position analytic alignment for SINS[J]. Journal of Beijing University of Aeronautics and Astronautics, 2015, 41(9): 1645-1650. doi: 10.13700/j.bh.1001-5965.2015.0033(in Chinese)
shu

The simplest multi-position analytic alignment for SINS

doi: 10.13700/j.bh.1001-5965.2015.0033

  • School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China

  • Received Date: 19 Jan 2015
  • Publish Date: 20 Sep 2015
    Abstract
  • The strapdown inertial navigation system (SINS) need to be installed on a servo platform and rotated through 90 ° or 180 ° about the up axis for traditional multi-position analytic alignment method. Thus it will bring inconvenience, and the precision of the servo platform will directly affect the precision of the multi-position analytic alignment method. To address the issue, a simplest multi-position analytic alignment method was proposed. The multi-position analytic alignment can be done by any two positions, or to say, the constant biases of the inertial measurement unit (IMU) can be ordinarily obtained through the information in any two positions. The computation procedure of this method was given and simulations proved the validity of this method. The simplest multi-position analytic alignment with any two positions can be used as a simple initial alignment method or a field calibration method. Moreover, it is proposed that the constant bias of the accelerometer or the constant drift of the gyroscope in a certain axis can be well estimated when the IMU stays in some particular attitudes. The conclusion can be used for further improvement of the multi-position alignment method.

     

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