Friction Torque Analysis of Planetary Roller Screw Mechanism in Roller Jamming

被引：16
|
作者：
Li, Linjie [1 ]
Fu, Yongling [1 ]
Zheng, Shicheng [1 ]
Fu, Jian [1 ]
Xia, Tianxiang [2 ]
机构：
[1] Beihang Univ, Sch Mech Engn & Automat, Beijing 100083, Peoples R China
[2] AVIC, Nanjing Engn Inst Aircraft Syst Jincheng, Nanjing 211100, Peoples R China
来源：
MATHEMATICAL PROBLEMS IN ENGINEERING | 2020年 / 2020卷 / 2020期
关键词：
ELECTROMECHANICAL ACTUATORS; MODEL;
D O I：
10.1155/2020/1392380
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The load distribution model of the planetary roller screw mechanism (PRSM) is established on the basis of Hertz contact theory. The objective is to obtain a friction torque model of the PRSM in roller jamming. An example is provided to calculate the friction torque of the PRSM in roller jamming. Thereafter, the transmission efficiency is calculated. A static structural analysis is performed using the finite element method to estimate the contact stress between the threads of the PRSM components. Computational results indirectly reveal that roller jamming exerts considerable influence on the friction torque of the PRSM. Results show that the friction torque of the planetary roller screw increases when the roller is jammed and the wear of the parts is accelerated. This condition leads to structural failure. The results of this study can serve as a foundation for electromechanical actuation systems, which can be useful in designing antijamming systems for safety-critical aircraft applications.
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页数：8
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