面向接触分离式摩擦发电机的机电耦合研究  

Electromechanical Coupling Research for Contact-Separation Mode Triboelectric Nanogenerators

作　　者：马腾浩 王松[1] 韩勤锴[1] 褚福磊[1] Ma Tenghao;Wang Song;Han Qinkai;Chu Fulei(Department of Mechanical Engineering,Tsinghua University,Beijing 100084,China)

机构地区：[1]清华大学机械系,北京100084

出　　处：《动力学与控制学报》2024年第9期62-71,共10页Journal of Dynamics and Control

基　　金：国家自然科学基金面上项目资助(12272199)。

摘　　要：因结构简单、功率密度高、可靠性好,接触-分离式摩擦发电机(Contact-separation mode triboelectric nanogenerator,CS-TENG)在环境振动能量采集领域展现出很好的发展潜力.考虑运动电极和固定电极之间的接触碰撞力,本文推导了运动电极的分段线性运动微分方程;结合CS-TENG的等效电路微分方程,建立了考虑电极间距非线性变化的机电耦合模型.利用谐波平衡法和弧长延拓技术,求解CS-TENG的动态输出特性并判断系统稳定性.采用数值积分和动态测试两种手段,验证谐波平衡结果的准确性.分别讨论激励幅值、接触刚度以及结构阻尼参数对系统动态输出特性的影响规律.结果有助于CS-TENG结构优化设计和工程实用化发展.Because of its simple structure,high power density and good reliability,the Contact-separation mode triboelectric nanogenerator(CS-TENG)shows a good development potential in the field of ambient vibration energy harvesting.Considering the contact and collision force between the moving electrode and the fixed electrode,the piecewise-linear motion differential equation of the moving electrode is derived.Combined with the equivalent circuit differential equation of CS-TENG,an electromechanical coupling model considering the nonlinear variation of electrode spacing is established.Harmonic balance method and arc length extension technique are used to solve the dynamic output characteristics of CS-TENG and judge the stability of the system.Both numerical integration and dynamic tests are applied for verifying the accuracy of harmonic balance results.The effects of excitation amplitude,contact stiffness and structural damping parameters on the dynamic output characteristics of the system are discussed.The results are useful for the structural optimization design and practical development of CS-TENG.

关 键 词：摩擦发电 接触分离 机电耦合 输出特性 谐波平衡 

分 类 号：O313.5[理学—一般力学与力学基础]