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<p>To address the issues of fixed bandgaps and limited regulation capability in traditional phononic crystals, this paper proposes a new type of piezoelectric phononic crystal structure. By integrating active control mechanisms, intelligent optimization algorithms, and real-time feedback systems, this structure achieves precise dynamic regulation of bandgap characteristics. While maintaining structural compactness and lightweight properties, it breaks through the limitations of traditional designs and realizes adaptive adjustment of bandgaps. Based on the electromechanical-thermal multi-physical field coupling mechanism, a complete closed-loop control framework from static parameter optimization to dynamic adaptive adjustment is constructed. The main contents include: a propeller-inspired configuration that enhances low-frequency vibration suppression capability, a PWE/FE hybrid calculation method that solves the problem of multi-field coupling, the MOCOA-CPO-SVR algorithm that improves optimization efficiency, and a sensor–controller–actuator closed-loop system that achieves high-precision frequency matching. This research provides a breakthrough solution for vibration and noise control in fields such as shipbuilding and aerospace.</p>

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Integration of active control and intelligent algorithms: achieving precise tunability of the band gap of piezoelectric phononic crystals mimicking propellers

  • 期刊论文

  • 发表日期：

    2025年8月31日

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  • Zhenqiao Liu,
  • Denghui Qian,
  • Zhiwen Zhang,
  • Feiyang He

摘要

To address the issues of fixed bandgaps and limited regulation capability in traditional phononic crystals, this paper proposes a new type of piezoelectric phononic crystal structure. By integrating active control mechanisms, intelligent optimization algorithms, and real-time feedback systems, this structure achieves precise dynamic regulation of bandgap characteristics. While maintaining structural compactness and lightweight properties, it breaks through the limitations of traditional designs and realizes adaptive adjustment of bandgaps. Based on the electromechanical-thermal multi-physical field coupling mechanism, a complete closed-loop control framework from static parameter optimization to dynamic adaptive adjustment is constructed. The main contents include: a propeller-inspired configuration that enhances low-frequency vibration suppression capability, a PWE/FE hybrid calculation method that solves the problem of multi-field coupling, the MOCOA-CPO-SVR algorithm that improves optimization efficiency, and a sensor–controller–actuator closed-loop system that achieves high-precision frequency matching. This research provides a breakthrough solution for vibration and noise control in fields such as shipbuilding and aerospace.