Energy harvesting from a dynamic vibro-impact dielectric elastomer generator subjected to rotational excitations
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ORIGINAL PAPER
Energy harvesting from a dynamic vibro-impact dielectric elastomer generator subjected to rotational excitations C. L. Zhang . Z. H. Lai
. G. Q. Zhang . D. Yurchenko
Received: 12 May 2020 / Accepted: 28 September 2020 Ó Springer Nature B.V. 2020
Abstract A vibro-impact (VI) dielectric elastomer generator (DEG) subjected to rotational excitations is studied in this paper for energy harvesting (EH). The VI DEG that has been demonstrated as an advanced vibrational energy harvester is first introduced, and an impact model is proposed to experimentally validate the energy harvesting mechanism of the impact-based DEGs. The VI DEG is then considered to harvest energy from a rotational excitation by being installed onto rotational machinery. The dynamical and electrical responses of the proposed system are fully studied through both theoretical analysis and numerical simulations. It is found that the system presents rich dynamical behaviors under the rotational excitation, and the rotational speed and the distance between two membranes are two key parameters to affect the system’s response and EH performance. Research
C. L. Zhang Z. H. Lai (&) G. Q. Zhang Guangdong Provincial Key Laboratory of Micro/Nano Optomechatronics Engineering, College of Mechatronics and Control Engineering, Shenzhen University, Shenzhen 518060, People’s Republic of China e-mail: [email protected] C. L. Zhang School of Mechatronics Engineering, Nanchang University, Nanchang 330031, People’s Republic of China D. Yurchenko Institute of Mechanical, Process and Energy Engineering, Heriot-Watt University, Edinburgh EH14 4AS, UK
results show the superiority of the proposed system which can produce a maximal output power as high as 0.88 mW from rotational excitations, and also provide guidelines to study the rotational speed-related system EH performance with given dimensional parameters or optimize the dimensional parameters under a given rotational speed. Keywords Dielectric elastomer generator Energy harvesting Rotational excitations Vibro-impact
1 Introduction In recent years, vast small-/micro-scale electronic devices, such as the wireless sensors, transmitters, wearable devices and controllers, have reached every corner of our life [1]. These devices play an important role in many areas, particularly in health sciences and critical infrastructure’s state monitoring [2]. The power consumption of such devices generally ranges from tens of lW to hundreds of mW [3]. Therefore, it is feasible to use energy harvesters to convert accessible energy from ambient environments (e.g., kinetic, wind, solar and thermal) to power these electronic devices or batteries [4]. In this case, the energy harvesters are used as sustainable, long-life and lowmaintenance power sources, which have great significance to maintain normal and stable work for these
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electronic devices. For small-/micro-scale electronic device, these energy harvesters have the potential to replace
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