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<p>To address the challenges of low overload capacity and insufficient thrust in large-scale deployment of overload-sensitive release units, this study proposes a multi-gasbag propulsion system that simultaneously enables thrust enhancement and separation attitude control. Through establishing a tilted gasbag expansion model aligned with release unit dynamics, we develop a mathematical framework characterizing the propulsion system's operation. Comprehensive validation is achieved through static inflation experiments and double-gasbag propulsion experiments, confirming both system reliability and model accuracy. The results indicate that the double-gasbag system increases maximum thrust by 9.2% and separation velocity by 14.6% compared to single-gasbag system. With inlet diameters spanning 4–24&#xa0;mm, the system achieves angular velocity control within ± 26.00&#xa0;rad/s and attitude angle regulation of ± 0.19&#xa0;rad. Angular velocity demonstrates proportional enhancement with increased inlet diameter differential between gasbags.</p>

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Precision design and control of dispersal characteristics of release unit based on multi-gasbag propulsion system

  • 期刊论文

  • 发表日期：

    2025年5月12日

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  • Xing-gan Lu,
  • Shen-shen Cheng,
  • Kun Jiang

摘要

To address the challenges of low overload capacity and insufficient thrust in large-scale deployment of overload-sensitive release units, this study proposes a multi-gasbag propulsion system that simultaneously enables thrust enhancement and separation attitude control. Through establishing a tilted gasbag expansion model aligned with release unit dynamics, we develop a mathematical framework characterizing the propulsion system's operation. Comprehensive validation is achieved through static inflation experiments and double-gasbag propulsion experiments, confirming both system reliability and model accuracy. The results indicate that the double-gasbag system increases maximum thrust by 9.2% and separation velocity by 14.6% compared to single-gasbag system. With inlet diameters spanning 4–24 mm, the system achieves angular velocity control within ± 26.00 rad/s and attitude angle regulation of ± 0.19 rad. Angular velocity demonstrates proportional enhancement with increased inlet diameter differential between gasbags.