【摘要】 磁场波动是周期法测G实验中的一个误差来源,作用到扭秤上的周期性变化磁场力矩会影响扭秤的运动周期.把磁场作用力矩当作噪声来处理,并利用非线性最小方差拟合法来提取扭秤周期.根据实验给出的相关参数值,利用数值模拟得到了周期性变化磁场力矩所引起扭秤周期的变化δT约为3.8×10-6s.更多还原

【Abstract】 The fluctuation of magnetic field is a source of error in G measurement with time-of-swing method,and the periodic change of magnetic torque will affect the pendulum’s period.In this paper,the magnetic torque is studied as noise,and the method of nonlinear leastsquare fitting is used to obtain the pendulum’s period.According to the parameters of the experiment provided,the variation of the pendulum’s period induced by the periodic change of magnetic torque is 3.8×10-6s by using the method of numerical simulation.更多还原