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<p>During aircraft ground taxiing, the nose landing gear (NLG) may occur shimmy, which threatens the aircraft handling stability and operational safety, and effective control measures are required for suppression. This paper designs a dual-stage tunable rotary-type inerter based on the planetary gear mechanism and develops a semi-active torsional inerter-based dynamic vibration absorber (TIDVA) consisting of the inerter-spring-damper system in parallel, which is installed between the NLG upper and lower structural struts to enhance shimmy suppression performance. The dynamic models of the NLG using passive TIDVA, semi-active TIDVA under on–off balance control strategy and on–off ground-hook control strategy are established, the shimmy amplitude and two-parameter bifurcation diagram are obtained to show the shimmy amplitude distribution and shimmy boundary using numerical continuation algorithm and bifurcation theory, aiming to highlight the superiority of semi-active TIDVA in suppressing NLG shimmy. The effect of inertance on the NLG shimmy suppression performance is investigated, with the cuckoo search (CS) optimization algorithm being used to optimize its structural parameters. The results show that the NLG using semi-active TIDVA under on–off ground-hook control strategy significantly reduces the torsional shimmy (TS) amplitude and narrows TS region, slightly decreases the lateral shimmy (LS) amplitude and LS region, it achieves better shimmy suppression performance compared to the passive TIDVA and semi-active TIDVA under on–off balance control strategy. Selecting appropriate upper and lower inertance limits for the semi-active TIDVA under on–off balance and on–off ground-hook control strategies can better improve the NLG shimmy suppression performance. Furthermore, the semi-active TIDVA optimized by the CS optimization algorithm has better shimmy suppression performance than the optimized passive TIDVA, which furthers narrows the shimmy region and reduces the shimmy amplitude, exhibiting superior shimmy suppression performance.</p>

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Suppressing aircraft nose landing gear shimmy using semi-active torsional inerter-based dynamic vibration absorber with on–off control strategy

  • 期刊论文

  • 发表日期：

    2026年4月17日

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  • Yong Wang,
  • Hanyan Bian,
  • Yin Yin,
  • Xiaohui Wei

摘要

During aircraft ground taxiing, the nose landing gear (NLG) may occur shimmy, which threatens the aircraft handling stability and operational safety, and effective control measures are required for suppression. This paper designs a dual-stage tunable rotary-type inerter based on the planetary gear mechanism and develops a semi-active torsional inerter-based dynamic vibration absorber (TIDVA) consisting of the inerter-spring-damper system in parallel, which is installed between the NLG upper and lower structural struts to enhance shimmy suppression performance. The dynamic models of the NLG using passive TIDVA, semi-active TIDVA under on–off balance control strategy and on–off ground-hook control strategy are established, the shimmy amplitude and two-parameter bifurcation diagram are obtained to show the shimmy amplitude distribution and shimmy boundary using numerical continuation algorithm and bifurcation theory, aiming to highlight the superiority of semi-active TIDVA in suppressing NLG shimmy. The effect of inertance on the NLG shimmy suppression performance is investigated, with the cuckoo search (CS) optimization algorithm being used to optimize its structural parameters. The results show that the NLG using semi-active TIDVA under on–off ground-hook control strategy significantly reduces the torsional shimmy (TS) amplitude and narrows TS region, slightly decreases the lateral shimmy (LS) amplitude and LS region, it achieves better shimmy suppression performance compared to the passive TIDVA and semi-active TIDVA under on–off balance control strategy. Selecting appropriate upper and lower inertance limits for the semi-active TIDVA under on–off balance and on–off ground-hook control strategies can better improve the NLG shimmy suppression performance. Furthermore, the semi-active TIDVA optimized by the CS optimization algorithm has better shimmy suppression performance than the optimized passive TIDVA, which furthers narrows the shimmy region and reduces the shimmy amplitude, exhibiting superior shimmy suppression performance.