落体法测刚体转动惯量的测量方法比较

COMPARISON OF DIFFERENT METHODS OF MEASURING RIGID BODY INERTIA BY THE FALLING BODY LAW

用JIJG-I刚体转动惯量实验仪的同组数据,分别用测角加速度法和测时间法计算待测圆盘的转动惯量,结果表明,测角加速度法比测时间法的测量精度可提高1到2个数量级,具有明显优点;同时分析了测时间法产生误差的主要原因,也指出了使用测角加速度法的注意事项.

This paper calculates the inertia of a disc by angular acceleration law and time law, respectively with the data of JIJG-I's rigid body inertia experimental apparatus, and it is indicated that the angular acceleration law gives better results than the time law by 1 to 2 orders of magnitude in precision. The main factors of the time law and the angular acceleration law are pointed out.