摘要
Traveling wave piezoelectric beam actuators(TWPBAs)present an advantageous structural configuration for self-moving actuators and hold significant promise for operation in confined spaces.However,current research on TWPBAs faces several limitations,including deficient design methods of excitation and structural parameters,inadequate evaluation metrics,and lack of a quantitative relationship between these parameters and evaluation metrics.This study presents a systematic approach to determining TWPBAs'structure and excitation parameters,proposes criteria for determining the excitation parameters through an established analytical model,and introduces an effective evaluation method for TWPBAs'driving.Through the analytical model and evaluation metrics,we reveal:(1)the coupling relationship between excitation parameters and structural parameters,(2)the influence of participating mode pairs on vibration response,(3)the quantitative relationship between the evaluation metrics and excitation parameters is also revealed.These conclusions are substantiated by the results of finite element analysis,laser vibration measurements,and motion test experiments.Notably,the practical application of TWPBAs in pipeline operations underscores their potential for use in endoscopy and precision instruments.
压电梁式行波致动器(TWPBA)由于结构简单劲凑的特点,十分适合在狭窄空间中作业.然而,目前TWPBA的研究面临着一些局限性,包括激励和结构参数的设计方法不足,评价指标不充分,以及激励参数和结构参数与评价指标之间缺乏定量关系等.本研究提出了确定TWPBA结构和激励参数的系统性设计方法,通过建立的解析模型提出了确定激励参数的准则,并提出了一套TWPBA致动器驱动效果评价指标.借助解析模型和评价指标,我们揭示了:(1)激励参数与结构参数之间的耦合关系,(2)参与模态对对振动响应的影响,(3)评价指标与激励参数之间的定量关系.这些结论得到了有限元分析、激光测振实验和运动测试实验结果的证实.最后,TWPBA在管道操作中的实际应用凸显了它们在内窥镜和精密仪器中的应用潜力.
作者
Yuanshuai Ding
Zengyao Lv
Hangyu Li
Yuyang Lin
Yongmao Pei
丁元帅;李航宇;林瑜阳;裴永茂(Department of Mechanics and Engineering Science,College of Engineering,Peking University,Beijing,100871,China;Department of Civil and Environmental Engineering,Northwestern University,Evanston,IL,60208,USA)
基金
supported by the National Natural Science Foundation of China(Grant Nos.12025201,11890681,12102007).
