Vibration energy harvesting from impulsive excitations via a bistable nonlinear attachment |
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| Institution: | 1. Department of Structural and Geotechnical Engineering, Sapienza University of Rome, Rome 00184, Italy;2. College of Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA;1. Department of Civil and Environmental Engineering, University of Tennessee, John D. Tickle Bldg., Knoxville, TN 37996, United States;2. Department of Aerospace Engineering, University of Illinois at Urbana-Champaign, 104 South Wright Street, Urbana, IL 61801, United States;3. Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, 205 North Mathews Avenue, Urbana, IL 61801, United States;4. Department of Mechanical Engineering, University of Akron, Akron, OH 44325, United States;5. Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, 1206 West Green Street, Urbana, IL 61801, United States;1. Shanghai Institute of Applied Mathematics and Mechanics, Shanghai University, Shanghai 200072, China;2. Faculty of Aerospace Engineering, Shenyang Aerospace University, Shenyang 110136, China;3. Department of Mechanics, Shanghai University, Shanghai 200444, China;4. Shanghai Key Laboratory of Mechanics in Energy Engineering, Shanghai University, Shanghai 200072, China;1. Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, 1206 W. Green Street, Urbana, IL 61801, USA;2. Department of Mechanical Engineering, University of Akron, Akron, OH 44325, USA;3. Department of Aerospace Engineering, University of Illinois at Urbana-Champaign, 104 S. Wright Street, Urbana, IL 61801, USA;1. School of Information and Electronic Engineering, Zhejiang Gongshang University, Hangzhou 310018, China;2. Department of Mechanical and Automation Engineering, The Chinese University of Hong Kong, Shatin, Hong Kong, China;1. Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China;2. The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen, PR China |
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| Abstract: | A vibration-based bistable electromagnetic energy harvester coupled to a directly excited primary system is examined numerically. The primary goal of the study is to investigate the potential benefit of the bistable element for harvesting broadband and low-amplitude vibration energy. The considered system consists of a grounded, weakly damped, linear oscillator (LO) coupled to a light-weight, weakly damped oscillator by means of an element which provides both cubic nonlinear and negative linear stiffness components and electromechanical coupling elements. Single and repeated impulses with varying amplitude applied to the LO are the vibration energy sources considered. A thorough sensitivity analysis of the system's key parameters provides design insights for a bistable nonlinear energy harvesting (BNEH) device able to achieve robust harvesting efficiency. This is achieved through the exploitation of three BNEH main dynamical regimes; namely, periodic cross-well, aperiodic (chaotic) cross-well, and in-well oscillations. |
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| Keywords: | Energy harvesting Negative stiffness Bistability Low-energy impacts Non-linear dynamics |
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