Input TorqueSignal Processing of Ball Screw Based on PSO-VMD Algorithm

In view of the motion stationarity of the miniature precision ball screw pair used in aerospace in the process of transmission, the input torque signal of the mechanism is optimized by particle swarm optimization algorithm to optimize the decomposition number and penalty factor in variational mode decomposition. The signal is decomposed into various modal components and their corresponding frequencies, the signal-to-noise ratio of the torque signal is improved, the stationarity of the torque signal is analyzed, and the essential characteristics of the torque signal are obtained. It provides a certain basis for judging the motion stationarity and fault diagnosis of the ball screw used in aerospace.