Influence of Magnetic Field on the Pendulum's Period in G Measurement with Time-of-Swing Method
Shao Cheng-Gang · Journal of Henan Normal University · 2013
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.