| Issue |
MATEC Web Conf.
Volume 306, 2020
The 6th International Conference on Mechatronics and Mechanical Engineering (ICMME 2019)
|
|
|---|---|---|
| Article Number | 01003 | |
| Number of page(s) | 5 | |
| Section | Power Engineering and Applied Mechanics | |
| DOI | https://doi.org/10.1051/matecconf/202030601003 | |
| Published online | 14 January 2020 | |
Dynamic Model of Planetary Roller Screw Mechanism with Considering Torsional Degree of Freedom
Shaanxi Engineering Laboratory for Transmissions and Controls, Northwestern Polytechnical University, Xi’an 710072, China
* Corresponding author: mashangjun@nwpu.edu.cn
To predict accurately the dynamics performance of planetary roller screw mechanism, it is necessary to establish its streamline and engineering-compliant dynamic model, which is the basis of mechanical design and precision control of the system. In this paper, the relative displacement between roller and ring gear along the line of action is deduced and the relationship between nature frequencies and the number of rollers is discussed. Considering the torsional stiffness of all components and the thread mesh stiffness based on the Hertzian contact theory, the purely torsional model for planetary roller screw mechanism is presented to reveal the natural frequencies and vibration mode characteristics of the system. The results show that the natural properties of undamped system in planetary roller screw mechanism are mainly reflected by two typical vibration modes: rotational mode and roller mode.
© The Authors, published by EDP Sciences 2020
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