三线摆法测刚体转动惯量的不确定度分析

摘要

通过三线摆法测量了圆环的转动惯量,给出了圆环转动惯量的实验及理论值,应用不确定度对实验结果进行了分析.结果发现,用三线摆法测量圆环的理论和实验的误差约为3％,应用不确定度可以准确的评定实验误差.对工程技术人员更好的掌握和理解不确定度具有一定的指导意义,同时也可以使物理实验教学与科学研究接轨.%The rotational inertia of the circle is measured by the tri -linear pendulum method, the theoretical value and experimental value of the rotational inertia of the circle are given, and results of the experiment are analyzed according to the uncertainty. The relative deviation is about 3% using the tri-linear pendulum method, the experimental deviation can be accurately evaluated by the uncertainty. It is beneficial for the engineers and technicians to master and understand the uncertainty, moreover, it is helpful to link to the science researcher and the physical experiment teaching.