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<p>The atomic gravimeter offers high precision, no drift, and excellent long-term stability, making it suitable for high-precision marine gravity measurements. However, the vibration environment generates various noise signals in the shipborne absolute gravity data, compromising measurement accuracy. Specifically, the vibration noise of the Raman mirror significantly impacts the gravimeter’s accuracy, necessitating vibration compensation. This article presents an innovative four-coefficient transfer function model for the vibration compensation for a self-designed shipborne absolute gravity measurement system. Then, the particle swarm optimization is introduced to identify the optimal compensation coefficients. Testing of the shipborne atomic gravimeter in the mooring state demonstrated an 81.25% reduction of the standard deviation of residuals (<InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="41598_2025_92544_Article_IEq1.gif" Format="GIF" Height="10" Rendition="HTML" Resolution="72" Type="Linedraw" Width="13" /> </InlineMediaObject> <EquationSource Format="TEX">\(\sigma\)</EquationSource> </InlineEquation>) between atomic interference fringes and the iterative fitting curve after compensation, yielding a measurement standard deviation of 0.210 mGal. This method was also applied to the test in the sailing state, achieving a 57.97% reduction of <InlineEquation ID="IEq2"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="41598_2025_92544_Article_IEq1.gif" Format="GIF" Height="10" Rendition="HTML" Resolution="72" Type="Linedraw" Width="13" /> </InlineMediaObject> <EquationSource Format="TEX">\(\sigma\)</EquationSource> </InlineEquation>, with the external coincidence accuracy of 0.407 mGal.</p>

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A vibration compensation approach for shipborne atomic gravimeter based on particle swarm optimization

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年3月14日

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  • Zhong-kun Qiao,
  • Zheng-hao Shen,
  • Ruo Hu,
  • Lin-ling Li,
  • Peng Yuan,
  • Guo-chao Wu,
  • Yuan Yuan,
  • Yin Zhou,
  • Bin Wu,
  • Qiang Lin

摘要

The atomic gravimeter offers high precision, no drift, and excellent long-term stability, making it suitable for high-precision marine gravity measurements. However, the vibration environment generates various noise signals in the shipborne absolute gravity data, compromising measurement accuracy. Specifically, the vibration noise of the Raman mirror significantly impacts the gravimeter’s accuracy, necessitating vibration compensation. This article presents an innovative four-coefficient transfer function model for the vibration compensation for a self-designed shipborne absolute gravity measurement system. Then, the particle swarm optimization is introduced to identify the optimal compensation coefficients. Testing of the shipborne atomic gravimeter in the mooring state demonstrated an 81.25% reduction of the standard deviation of residuals ( \(\sigma\) ) between atomic interference fringes and the iterative fitting curve after compensation, yielding a measurement standard deviation of 0.210 mGal. This method was also applied to the test in the sailing state, achieving a 57.97% reduction of \(\sigma\) , with the external coincidence accuracy of 0.407 mGal.