CAJ | 학술논문

为了提升压电悬臂梁采集振动能量的能力，研究了一种具有多频振动响应的振动能量采集器。在压电悬臂梁与振动激励源之间增加一个附加梁，压电悬臂梁和附加梁的末端分别安装一个质量块，压电悬臂梁和附加梁垂直连接。附加梁的末端质量被设计为远大于压电梁的末端质量，而压电梁的一阶谐振频率在附加梁的前两阶谐振频率之间。采用该设计，压电悬臂梁的振动响应是多个谐振频带的叠加。通过建立机电解析模型，描述了所提出的振动能量采集器的振动响应和发电特性，同时制作了一个振动能量采集器样机进行试验，结果表明，与传统的悬臂梁振动能量采集器相比，所提出的振动能量采集器可以在更宽的频带范围内采集更多的振动能量。
위료제승압전현비량채집진동능량적능력，연구료일충구유다빈진동향응적진동능량채집기。재압전현비량여진동격려원지간증가일개부가량，압전현비량화부가량적말단분별안장일개질량괴，압전현비량화부가량수직련접。부가량적말단질량피설계위원대우압전량적말단질량，이압전량적일계해진빈솔재부가량적전량계해진빈솔지간。채용해설계，압전현비량적진동향응시다개해진빈대적첩가。통과건립궤전해석모형，묘술료소제출적진동능량채집기적진동향응화발전특성，동시제작료일개진동능량채집기양궤진행시험，결과표명，여전통적현비량진동능량채집기상비，소제출적진동능량채집기가이재경관적빈대범위내채집경다적진동능량。
To improve performance of vibration energy harvesting for piezoelectric cantilever,a vibration energy harvester with multifrequency responses was presented.An auxiliary beam was in-serted between the piezoelectric cantilever and vibration base.Two tip masses were installed at the end of the piezoelectric beam and the auxiliary beam respectively.The two beams were connected per-pendicularly.The weight of the auxiliary beam mass was designed to be much greater than that of the piezoelectric beam,and the first natural frequency of the piezoelectric beam was chosen between the first two natural frequencies of the auxiliary beam.In this way,the vibration response of the piezoe-lectric beam is j ust the sum of multiple frequency bands.An analytical electromechanical model was proposed to describe vibration response and energy harvesting feature of the proposed harvester.A prototype device was developed for testing.The results show that,compared to the conventional can-tilevered piezoelectric harvester,the proposed one is capable of harvesting much energy in a broader frequency band.