测量圆盘转动惯量产生误差的曲线研究

结合三线摆实验的基本过程,进行实验数据的采集。利用投影法来测量圆盘的转角大小,借助于matlab的cftool工具箱,对数据进行曲线拟合,对测出来的二组数据拟合,得到转角与百分差曲线图。通过误差的大小比较,得出圆盘转动惯量测量值与理论值的百分差随转角变化最接近于三次曲线。

Measuring Moment of Inertia of the Disc to Produce the Error Curve of Research

Combined with the basic process of three wire pendulum experiments,the experiment data were col-lected.Projection method is used to measure the rotation of the disk size,with the aid of cftool toolbox in mat-lab,the data curve fitting,the measured data of three groups of Angle with the percentage difference curve fit-ting.By comparing the size of the error,and moment of inertia of the disc the percentage difference between the theoretical value and measured value changing with Angle is the most close to the cubic curve.