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Energies 2018, 11(10), 2687; https://doi.org/10.3390/en11102687

Vibration Characteristics Analysis of Planetary Gears with a Multi-Clearance Coupling in Space Mechanism

1
School of Mechanical Engineering, Hebei University of Technology, Tianjin 300130, China
2
Hebei Key Laboratory of Robot Perception and Human-Robot Interaction, Tianjin 300130, China
3
State Key Laboratory of Robotics and System, Harbin Institute of Technology, Harbin 150080, China
4
School of Naval Architecture and Ocean Engineering, Harbin Institute of Technology at Weihai, Weihai 264209, China
*
Authors to whom correspondence should be addressed.
Received: 24 September 2018 / Revised: 24 September 2018 / Accepted: 29 September 2018 / Published: 9 October 2018
(This article belongs to the Special Issue Control and Nonlinear Dynamics on Energy Conversion Systems)
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Abstract

Multi-clearance is the main cause for the performance and reliability decline of complicated mechanical systems. The increased clearance could induce contacts and impacts in joints, and consequently affect control accuracy. A nonlinear dynamic model of planetary gears with multi-clearance coupling is proposed in the current study to investigate the mechanism of influence of clearance on the dynamic performance. In addition, the coupling relationship between radial clearance and backlash is integrated into the multi-body system dynamics. The vibration characteristics of planetary gears with the changes of rotational velocity, clearance size and inertia load are explored. The numerical simulation results show that there are complex coupling relations in planetary gear systems, due to the multi-clearance coupling. The phenomenon of system resonance may occur with the changes of rotational velocities and clearances’ sizes. Multi-clearance coupling can significantly increase the resonant response of planetary gear systems in empty-load or light-load states. View Full-Text
Keywords: space mechanism; multi-clearance; nonlinear dynamic model; planetary gears; vibration characteristics space mechanism; multi-clearance; nonlinear dynamic model; planetary gears; vibration characteristics
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Zhang, H.; Qi, C.; Fan, J.; Dai, S.; You, B. Vibration Characteristics Analysis of Planetary Gears with a Multi-Clearance Coupling in Space Mechanism. Energies 2018, 11, 2687.

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