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<p>This study presents the design and performance evaluation of an updated six-degree-of-freedom elastic pendulum thrust stand with enhanced measurement capabilities. The thrust stand is designed to measure all thrust and torque components, which are critical for advanced missions utilizing miniature propulsion systems. Key enhancements include the integration of high-resolution electrostatic capacitive displacement sensors and the expansion of measurable test targets. The thrust stand employs a null-balance method and was successfully demonstrated with a few mN-class cold-gas thruster. The results showed significant improvements in measurement resolution, with uncertainties of thrust vector components within 0.13 mN and those of torque components within 0.028 mN<InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="44205_2025_120_Article_IEq1.gif" Format="GIF" Height="9" Rendition="HTML" Resolution="72" Type="Linedraw" Width="8" /> </InlineMediaObject> <EquationSource Format="TEX">\(\cdot\)</EquationSource> <EquationSource Format="MATHML"><math> <mo>·</mo> </math></EquationSource> </InlineEquation>m for a 4 mN thrust level. This research aims to establish a practical and versatile six-degree-of-freedom measurement system applicable to a wide range of propulsion systems, including electric propulsion systems.</p>

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Performance improvement of a six-degree-of-freedom elastic pendulum thrust stand for micropropulsion

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年4月14日

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  • Isamu Moriai,
  • Hiroyuki Koizumi,
  • Ten Arai,
  • Hayato Nakamura,
  • Kimiya Komurasaki

摘要

This study presents the design and performance evaluation of an updated six-degree-of-freedom elastic pendulum thrust stand with enhanced measurement capabilities. The thrust stand is designed to measure all thrust and torque components, which are critical for advanced missions utilizing miniature propulsion systems. Key enhancements include the integration of high-resolution electrostatic capacitive displacement sensors and the expansion of measurable test targets. The thrust stand employs a null-balance method and was successfully demonstrated with a few mN-class cold-gas thruster. The results showed significant improvements in measurement resolution, with uncertainties of thrust vector components within 0.13 mN and those of torque components within 0.028 mN \(\cdot\) · m for a 4 mN thrust level. This research aims to establish a practical and versatile six-degree-of-freedom measurement system applicable to a wide range of propulsion systems, including electric propulsion systems.