人体运动俘能背包的输出功率建模与多参数耦合因素研究  

Output power model and multi-parameter coupling effect of a wearable energy harvesting backpack

作　　者：侯泽昊 曹军义 HOU Ze-hao;CAO Jun-yi(Key Laboratory of Education Ministry for Modern Design and Rotor-Bearing System,Xi′an Jiaotong University,Xi′an 710049,China)

机构地区：[1]西安交通大学现代设计及转子轴承系统教育部重点实验室,陕西西安710049

出　　处：《振动工程学报》2021年第2期219-226,共8页Journal of Vibration Engineering

基　　金：国家自然科学基金资助项目(51575426,51811530321)。

摘　　要：人‑机电耦合俘能背包的输出功率的影响因素复杂,缺乏合理的建模设计方法,因此本文基于机械振动和电路理论建立了人体运动俘能背包的功率输出模型。采用理论模型数值仿真分析了人体负重质量、增速比和行走运动对俘能功率的影响。设计了一种电磁式俘能背包,并搭建了多参数测试系统,实验研究了不同负重质量、运动速度、增速比及其耦合情况下对俘能功率的影响。多参数耦合与阻抗匹配实验结果表明:俘能功率随着负重质量和行走速度的增大而增大,而且在人‑机电耦合情况下存在最优增速器增速比和最优外接阻抗使背包输出功率最大。理论和实验结果表明设计的功率输出模型可以为人‑机电耦合俘能背包参数设计提供较好的理论指导。Due to complex effects of different human-electromechanical coupling parameters,theoretical models and design of output power of wearable energy harvesting backpacks remain uninvestigated.In this paper,the captured power model of a wearable energy harvesting backpack is established based on engineering vibration and circuit theory.Based on the proposed model,the influence of load mass,gearbox ratio and walking motion on the captured power is numerically analyzed.The multi-parameter experimental system based on the proposed electromagnetic energy harvesting backpack is built to study the relationship between weight,speed,gearbox ratio and the captured power.Experimental results show that weight and speed are positively correlated with the captured power.The gearbox ratio and external resistance have optimal values to maximize the output power performance of an energy harvesting backpack.It is also demonstrated that the proposed power output model can provide good theoretical guidance for designing optimal parameters of the wearable energy harvesting backpack.

关 键 词：俘能背包 机械振动 输出功率建模 多参数耦合因素 

分 类 号：TH113.1[机械工程—机械设计及理论] TU311.3[建筑科学—结构工程]