轴用压电式六维大力值测力仪分载研究  

Study of load-distribution of piezoelectric six-axis heavy force dynamometer on shaft

作　　者：房庆华[1] 张军[1] 李映君[1] 贾振元[1] 钱敏[1] 

机构地区：[1]大连理工大学机械工程学院,大连116024

出　　处：《仪器仪表学报》2011年第2期439-444,共6页Chinese Journal of Scientific Instrument

基　　金：国家重点基础研究发展计划973(2006CB705406)资助项目

摘　　要：分载比的确定是轴用压电式六维大力值测力仪设计的关键。对现有的该类测力仪分载原理进行了分析研究,建立了理论结构模型,基于材料力学、结构力学对各向分载比公式进行了理论推导,得到测力仪各向分载比公式,并通过ANSYS软件对受夹具夹紧力分布影响较大的轴向分载进行仿真分析,修正了轴向分载比公式。设计了静态标定实验,对传感器及测力仪分别进行了静态标定,验证了各项分载比理论公式,分析了影响分载比的主要参数。结果表明,该公式可为轴用压电式六维大力值测力仪提供设计依据。In designing piezoelectric six-axis heavy force dynamometer on shaft,determining load-distribution ratio is the key issue.Therefore,we analyze the load-distribution principles of dynamometers,build corresponding mechanical models and derive the theoretical formulas of load-distribution ratio based on mechanics of materials and structural mechanics.Then,we analyze the mechanical models of the fixtures using ANSYS software and modify axial load-distribution formula.Static calibration experiments are designed,and the sensors and dynamometer are calibrated,which verifies the theoretical formulas of load-distribution ratio.Finally,the main parameters that influence load-distribution ratio are analyzed.Results show that the proposed theoretical formulas of load-distribution radio can provide a reference for the design of piezoelectric six-axis heavy force dynamometers on shaft.

关 键 词：压电石英 大力值 轴向分载 横向分载 分载比 

分 类 号：TH823[机械工程—仪器科学与技术]