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| 随机激励下压电能量采集器性能研究 |
| Research on the performance of piezoelectric energy harvester under random excitationResearch on the Performance of Piezoelectric Energy Harvester under Random Excitation |
| 投稿时间：2025-07-22 修订日期：2025-12-29 |
| DOI： |
| 中文关键词: 三稳态 动力放大器 随机激励 能量转换效率 非线性动力学 |
| 英文关键词: tri-stable, power amplifier, random excitation, energy conversion efficiency, nonlinear dynamics |
| 基金项目:安徽省高校省级自然科学研究项目-重点项目 |
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| 中文摘要: |
| 在低幅值和随机激励条件下，将环境振动高效转化为电能对能量采集至关重要。本文提出了一种新型三稳态压电能量采集装置（TPEH+DM），结合了动力放大器，专为低轨道随机振动设计。TPEH+DM由压电悬臂梁与创新型动力放大器组成，能够显著增强悬臂梁的转动和横向位移，降低势阱逃逸触发阈值，提升能量转移效率。在强激励条件下，该系统的功率输出大幅高于传统装置。通过数值仿真与理论分析，验证了TPEH+DM在低轨道激励下的优越性能。调整块体质量及弹簧刚度比可进一步提升功率输出。该系统在复杂、不可预测的激励条件下表现出卓越的适应性与稳定性，显示出在能量采集领域的优势和潜力。本文的结构改进为能量采集技术提供了新的发展思路，提升了系统的效率与可靠性。 |
| 英文摘要: |
| Efficiently converting environmental vibrations into electrical energy under low-amplitude and stochastic excitation conditions is crucial for energy harvesting applications. This study presents a novel tri-stable piezoelectric energy harvesting device (TPEH+DM), integrated with a dynamic amplifier, specifically designed for low-frequency random vibrations. The TPEH+DM system consists of a piezoelectric cantilever beam and an innovative dynamic amplifier, which significantly enhances the rotational and lateral displacements of the cantilever, lowers the triggering threshold for jumps, and improves energy transfer efficiency. Under strong excitation conditions, the power output of this system substantially exceeds that of conventional devices. Through numerical simulations and theoretical analysis, the superior performance of the TPEH+DM system under low-frequency orbital excitation is validated. Further optimization of the block mass and spring stiffness ratios can enhance the power output. The system demonstrates outstanding adaptability and stability under complex and unpredictable excitation conditions, highlighting its potential and advantages in the field of energy harvesting. The structural improvements proposed in this study provide new insights for the advancement of energy harvesting technologies, significantly enhancing system efficiency and reliability. |
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