机构地区: 大连理工大学机械工程学院
出 处: 《仪器仪表学报》 2011年第2期439-444,共6页
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.