Nonlinear dynamic analysis of variable lead preloaded single nut ball screw considering the variation of working parameters

In this study, a five-degree-of-freedom dynamic model of variable lead preloaded single nut ball screw is proposed. The proposed model considers the effect of excitation amplitude, deflection angle, the number of balls, and the preload into consideration. Moreover, to study the effect of working parameters on nonlinear dynamics, bifurcation diagram, 3-D frequency spectrum, phase diagram, and Poincare section with different system parameters are shown in the Discussion section. The numerical analysis indicates that the system can exhibit different motion states, and the continuous frequency component can be observed. Moreover, a series of experiments are conducted to estimate the dynamic parameters and validate the proposed dynamic model.

Automated summary

This study proposes a five-degree-of-freedom dynamic model of variable lead preloaded single nut ball screw, taking into consideration the effects of excitation amplitude, deflection angle, the number of balls, and preload. The analysis shows that the system can exhibit different motion states and continuous frequency components, which is validated through a series of experiments.