کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
560984 1451848 2017 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Enhancing ability of harvesting energy from random vibration by decreasing the potential barrier of bistable harvester
ترجمه فارسی عنوان
افزایش توانایی از انرژی از ارتعاش تصادفی با کاهش موانع بالقوه برداشت برق فشار قوی
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر پردازش سیگنال
چکیده انگلیسی


• An improved BEH is developed by adding an additional magnet to reduce the barrier.
• High efficiency of harvesting weak random vibration energy are realized by IBEH.
• The additional magnet can be optimized to maximum the power for a certain intensity.

When a bistable energy harvester (BEH) is driven by weak random excitation, its harvesting efficiency will decrease due to the seldom occurrence of interwell motion. To overcome this defect, we developed an improved bistable energy harvester (IBEH) from BEH by adding a small magnet at the middle of two fixed magnets. It is proved that the attractive force originated from the additional magnet can pull down the potential barrier and shallow the potential well, but still keep the middle position of beam unstable. This can make jumping between potential wells easier. Thus IBEH can realize snap-through even at fairly weak excitation. The magnetic potential energy is given and the electromechanical equations are derived. Then the harvesting performance of IBEH under random excitation is studied. Validation experiments are designed and carried out. Comparisons prove that IBEH is preferable to BEH in harvesting random energy and can give out a high output voltage even at weak excitation. The size of additional magnet can be optimized to reach the best performance of IBEH.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Mechanical Systems and Signal Processing - Volume 85, 15 February 2017, Pages 71–81
نویسندگان
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