离心机工作台工作半径研究

Research on Working Radius of Plate for Precision Centrifuge

加速度准确度作为加速度引控开关等惯性传感器的重要参数之一,在工业及国防领域起着重要作用。加速度的准确度通常采用精密离心机标定,影响离心机准确度的主要有速率精度和旋转工作半径。针对这些问题重点从离心力引起的工作半径动态变化量角度出发,采用有限元分析法分析了在不同工作台直径、厚度及离心加速度条件下工作半径的变化量,通过对数据分析及对各个参量进行相互比较,得出在工作台设计过程中需要遵循的原则,为后续离心机工作台的设计及不确定度评定提供了参考依据。

Acceleration accuracy,as one of the critical parameters of inertial sensors such as acceleration reference and control switches,plays a significant role in industrial and defense sectors.The calibration of acceleration accuracy is commonly conducted using precision centrifuges,and main factors affecting the accuracy of the centrifuge are rate accuracy and the radius of rotation during operation.Addressing these issues,the dynamic changes in the operational radius caused by centrifugal force is focused on,employing finite element analysis to examine the variations in operational radius under different conditions of worktable diameter,thickness,and centrifugal acceleration.Through data analysis and comparative evaluation of various parameters,principles to be followed in the design process of the worktable are identified,providing a reference for the design and uncertainty evaluation of centrifuge worktables in subsequent stages.