不同线长高度测量圆盘转动惯量产生误差的研究

Different Line Length Error of Height Measuring Moment of Inertia of the Disc are Generated

实验中由三线摆法测定物体的转动惯量,现在采用累积放大法测量周期,用平均法计算周期,来研究不同线长高度下测量圆盘转动惯量产生误差的影响。并分析圆盘转动惯量测量值与理论值的百分差与线长高度之间的关系。最后得出实验结果,发现线长高度越小,物体的转动惯量测量误差越大,当高度为50 cm时,物体的转动惯量测量误差最小。

The experiment consists of three wire pendulum method for determining the rotational inertia of an object,now the multiplying method is used to measure cycle,cycle was calculated by the average method,to study under different line length height error influence measuring moment of inertia of the disc.Moment of iner-tia of the disc and analysis the percentage difference between the theoretical value and measured value and the relationship between the line lengthheights.Finally the experimental results,to find,line length,the smaller the height,the rotational inertia of the object measurement error,the greater the when height is 50 cm,the rotational inertia of the object measurement error is minimal.