Energy conversion efficiency and operation bandwidth are two main concerns in piezoelectric energy harvesting in low-frequency vibration environments. This paper presents a compact two-degree-of-freedom nonlinear piezoelectric energy harvester (2DOF NPEH) with a stopper. The proposed harvester consists of an elastic beam, a piezoelectric beam with tip mass, a pair of repulsive magnets, and a mechanical stopper. A bistable configuration is established through magnetic interaction. This study investigates the generating characteristics of the 2DOF NPEH under frequency-sweep excitation, utilizing a rigid stopper (RS) and different elastic stoppers (ESs). The experimental results indicate that the implementation of a mechanical stopper in a NPEH contributes to widening the operation bandwidth and enhancing the peak voltage. As the stiffness of the stopper increases, the bandwidth gradually shrinks while the peak voltage increases. The optimal energy conversion efficiency depends on the stiffness of the ES, and it occurs when the wire diameter of the spring is 1.2 mm. Compared with the 2DOF NPEH without a stopper, the utilization of a RS results in a 13.85-fold increase in the bandwidth of the generator at the first resonance. Moreover, the maximum absolute voltage is 12.82 times and 3.47 times the output voltage of the 2DOF NPEH at the first and second resonance, respectively. This work offers valuable insights into the design and optimization of piezoelectric energy harvesters in practical applications.
机构:
Xi An Jiao Tong Univ, Sch Humanities & Social Sci, Xian 710049, Peoples R China
Xi An Jiao Tong Univ, Inst Heritage Sites & Hist Architecture Conservat, Xian 710049, Peoples R China
Xian Univ Architecture & Technol, Sch Architecture, Xian 710055, Peoples R ChinaXi An Jiao Tong Univ, Sch Humanities & Social Sci, Xian 710049, Peoples R China
Jiang, Weile
Wang, Lu
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Xi An Jiao Tong Univ, State Key Lab Mfg Syst Engn, Int Joint Lab Micro Nano Mfg & Measurement Techno, Xian 710049, Peoples R China
Xi An Jiao Tong Univ, Sch Mech Engn, Xian 710049, Peoples R ChinaXi An Jiao Tong Univ, Sch Humanities & Social Sci, Xian 710049, Peoples R China
Wang, Lu
Zhao, Libo
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Xi An Jiao Tong Univ, State Key Lab Mfg Syst Engn, Int Joint Lab Micro Nano Mfg & Measurement Techno, Xian 710049, Peoples R China
Xi An Jiao Tong Univ, Sch Mech Engn, Xian 710049, Peoples R ChinaXi An Jiao Tong Univ, Sch Humanities & Social Sci, Xian 710049, Peoples R China
Zhao, Libo
Luo, Guoxi
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Xi An Jiao Tong Univ, State Key Lab Mfg Syst Engn, Int Joint Lab Micro Nano Mfg & Measurement Techno, Xian 710049, Peoples R China
Xi An Jiao Tong Univ, Sch Mech Engn, Xian 710049, Peoples R ChinaXi An Jiao Tong Univ, Sch Humanities & Social Sci, Xian 710049, Peoples R China
Luo, Guoxi
Yang, Ping
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Xi An Jiao Tong Univ, State Key Lab Mfg Syst Engn, Int Joint Lab Micro Nano Mfg & Measurement Techno, Xian 710049, Peoples R China
Xi An Jiao Tong Univ, Sch Mech Engn, Xian 710049, Peoples R ChinaXi An Jiao Tong Univ, Sch Humanities & Social Sci, Xian 710049, Peoples R China
Yang, Ping
Ning, Shaobo
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Xi An Jiao Tong Univ, Inst Heritage Sites & Hist Architecture Conservat, Xian 710049, Peoples R ChinaXi An Jiao Tong Univ, Sch Humanities & Social Sci, Xian 710049, Peoples R China
Ning, Shaobo
Lu, Dejiang
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Xi An Jiao Tong Univ, State Key Lab Mfg Syst Engn, Int Joint Lab Micro Nano Mfg & Measurement Techno, Xian 710049, Peoples R China
Xi An Jiao Tong Univ, Sch Mech Engn, Xian 710049, Peoples R ChinaXi An Jiao Tong Univ, Sch Humanities & Social Sci, Xian 710049, Peoples R China
Lu, Dejiang
Lin, Qijing
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Xi An Jiao Tong Univ, State Key Lab Mfg Syst Engn, Int Joint Lab Micro Nano Mfg & Measurement Techno, Xian 710049, Peoples R China
Xi An Jiao Tong Univ, Sch Mech Engn, Xian 710049, Peoples R ChinaXi An Jiao Tong Univ, Sch Humanities & Social Sci, Xian 710049, Peoples R China
机构:
Hong Kong Univ Sci & Technol Guangzhou, Internet Things Thrust, Guangzhou, Peoples R ChinaHong Kong Univ Sci & Technol Guangzhou, Internet Things Thrust, Guangzhou, Peoples R China
Hu, Guobiao
Tang, Lihua
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Univ Auckland, Dept Mech Engn, Auckland, New ZealandHong Kong Univ Sci & Technol Guangzhou, Internet Things Thrust, Guangzhou, Peoples R China
Tang, Lihua
Wang, Junlei
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Zhengzhou Univ, Sch Mech & Power Engn, Zhengzhou, Peoples R ChinaHong Kong Univ Sci & Technol Guangzhou, Internet Things Thrust, Guangzhou, Peoples R China
Wang, Junlei
Li, Xin
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Xidian Univ, Guangzhou Inst Technol, Xian, Peoples R ChinaHong Kong Univ Sci & Technol Guangzhou, Internet Things Thrust, Guangzhou, Peoples R China
Li, Xin
Liang, Junrui
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ShanghaiTech Univ, Sch Informat Sci & Technol, Shanghai, Peoples R ChinaHong Kong Univ Sci & Technol Guangzhou, Internet Things Thrust, Guangzhou, Peoples R China
Liang, Junrui
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