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Purpose <p>Aerospace precision payloads require not only accurate positioning of the target but also effective suppression of micro-vibrations generated by the carrier spacecraft. To address this dual requirement, this paper proposes an integrated design concept for positioning and vibration isolation.</p> Design Approach <p>The design solution is a new compliant amplification structure embedded with local resonance and acoustic black holes. The compliant amplification structure is capable of displacement amplification and precise positioning. In the low-frequency range, the local resonance band-gap produces an effective suppression of vibrations. In the high-frequency range, the bending wave absorption effect of the acoustic black hole is utilised to reduce the resonance peaks.</p> Findings <p>The results show that the designed phononic crystal structure opens a low-frequency band-gap in the range of 27&#xa0;Hz to 67&#xa0;Hz. Above the cutoff frequency of 82&#xa0;Hz, the resonance peak is suppressed by the bending wave absorption effect of the acoustic black hole.</p> Practical Implications <p>Open-loop positioning experiments of the actuator show the potential of the proposed integrated positioning and vibration isolation scheme. The results provide a reference for future platform-level design solutions.</p>

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Vibration Isolation Design of Compliant Amplification Mechanism Embedded with Phononic Crystals and Acoustic Black Hole

  • 期刊论文

  • 发表日期：

    2025年11月21日

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  • Xiaoqing Sun,
  • Kaibin Shu,
  • Jun Wu,
  • Yanhao Chen,
  • Yao Liu

摘要

Purpose

Aerospace precision payloads require not only accurate positioning of the target but also effective suppression of micro-vibrations generated by the carrier spacecraft. To address this dual requirement, this paper proposes an integrated design concept for positioning and vibration isolation.

Design Approach

The design solution is a new compliant amplification structure embedded with local resonance and acoustic black holes. The compliant amplification structure is capable of displacement amplification and precise positioning. In the low-frequency range, the local resonance band-gap produces an effective suppression of vibrations. In the high-frequency range, the bending wave absorption effect of the acoustic black hole is utilised to reduce the resonance peaks.

Findings

The results show that the designed phononic crystal structure opens a low-frequency band-gap in the range of 27 Hz to 67 Hz. Above the cutoff frequency of 82 Hz, the resonance peak is suppressed by the bending wave absorption effect of the acoustic black hole.

Practical Implications

Open-loop positioning experiments of the actuator show the potential of the proposed integrated positioning and vibration isolation scheme. The results provide a reference for future platform-level design solutions.