测量不同质量圆盘下圆盘的转动惯量误差的研究

Study on Measurement Deviation of the Moment of Inertia of the Disc under Different Quality

实验由三线摆法测量物体的转动惯量,现在采用累积放大法测量周期,用平均值计算周期,分析圆盘转动惯量测量值及理论值的百分差与下圆盘质量之间的关系,从而来研究一定高度不同质量圆盘下圆盘转动惯量产生的误差影响。最后得出实验结果,下圆盘质量越小,误差越小,当下圆盘质量小于0.085kg时,误差突然增大。

In this experiment,we measure moment of inertia with three line pendulum method,and adopt the cumulative amplification method to measure periods,use mean value to calculation periods,analyze the relationship between disc inertia measurement value and theoretical value of the percentage difference and the quality of the lower disc,thus to study the influence of the measurement deviation caused by the moment of inertia of the disc under a certain height of different mass. Finally,experimental results show that the lower the quality of the lower disk,the smaller the deviation,when the disc mass is less than 0.085 kg,the deviation increases abruptly.