Vibration dynamic model modeling method for ball screw transmission system

The invention belongs to the field of automatic control, and particularly relates to a vibration dynamic model modeling method for a ball screw transmission system, which comprises the following steps of: measuring the mass of a nut pair and a motion platform in the ball screw transmission system through a mass meter; a lead screw torsion damping coefficient, a nut pair axial damping coefficient and a motion platform damping coefficient are obtained through a free attenuation method and sent to a data processing module; the ball screw transmission mechanism and the measuring unit are assembled; the data processing module obtains the total kinetic energy, the total potential energy and the total energy consumption of the ball screw transmission system according to the data measured by the measuring unit; the modeling module obtains a relational expression among the total kinetic energy, the total potential energy and the total energy consumption; and establishing an oscillatory differential equation of the bal