Three-pendulum Method Based on Transfer Function for the Measurement and Analysis of Inertia Moment

Based on the traditional three-pendulum method,we introduced the transfer function method and derived the expression of inertia moment of the three-wire pendulum system,which take into account air resistance and other damping effects of three-wire pendulum.This method increases swing angle of the system,and overcomes the drawback of big measurement error of swinging cycle because of the three-wire pendulum small-angle swinging.Applying the minimum zone condition system recognition theory to the system,we obtained the inertia moment of the measured object.