农业机械学报2025，Vol.56Issue(12)：121-130,246,11.DOI:10.6041/j.issn.1000-1298.2025.12.010
电动拖拉机变刚度振动馈能装置频率匹配方法与试验
Frequency Matching Method and Experiment of Variable Stiffness Vibration Energy Feedback Device for Electric Tractor
摘要
Abstract
In allusion to the efficient vibration energy recovery problem of a wheeled electric tractor,a variable stiffness spring was innovatively integrates into the research team's existing vibration energy feedback device and a method was proposed to match the device's resonance frequency with the road surface excitation frequency,thereby improving energy capture performance.Firstly,the range of road excitation frequency was analyzed based on the road grade and vehicle speed of the electric tractor.Subsequently,a nonlinear 10-degree-of-freedom dynamic model of the variable stiffness vibration energy feedback device was formulated.With the QR decomposition,implicit restart Arnoldi method(IRAM)and adaptive cross approximation algorithm(AC A),the modal frequencies of the device were solved,and the modal evolution law was analyzed by combining these methods with the finite element method.On this basis,the stiffness coefficient of variable stiffness spring was determined,and the frequency matching method for the variable stiffness vibration energy feedback device was proposed.Finally,fixed-frequency and swept-frequency bench tests were conducted to compare the energy capture performance of the fixed and variable stiffness vibration energy feedback devices.The results demonstrated that the variable stiffness spring structure significantly broadened the resonance band of the device,increased the maximum instantaneous output voltage to 52.2 V,and boosted the average output power and electricity generation by 34.4％and 42.8％,respectively,at the same time,it met the vibration reduction requirement for the battery pack.The above research can provide theoretical and technical support for the power supply of electric tractors and it was of great significance to promote the development of its energy-saving technology.关键词
电动拖拉机/变刚度/频率匹配/振动俘能Key words
electric tractor/variable stiffness/frequency matching/vibration energy capture分类
农业科技引用本文复制引用
WANG Wei,LI Ziqiang,HAN Jialu,ZHAO Jie..电动拖拉机变刚度振动馈能装置频率匹配方法与试验[J].农业机械学报,2025,56(12):121-130,246,11.基金项目
国家重点研发计划项目(2016YFD0700800) （2016YFD0700800）
