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Dynamics modeling and modal experimental study of high speed motorized spindle

Li, Yunsong; Chen, Xiaoan; Zhang, Peng and Zhou, Jinming LU (2017) In Journal of Mechanical Science and Technology 31(3). p.1049-1056
Abstract

This paper presents a dynamical model of high speed motorized spindles in free state and work state. In the free state, the housing is modeled as a rotor with equivalent masses including bearing pedestals, motor stator and rear end cover. As a consequence, a double rotor dynamics can be modeled for high speed motorized spindles by a bearing element which connects the housing and bearing pedestals. In the work state, the housing is fixed and the system becomes a bearing-rotor dynamical model. An excitation-measurement test in the free state is designed to analyze the cross spectral density and auto spectral density of input and output signals. Then the frequency response function of system and coherence function of input and output... (More)

This paper presents a dynamical model of high speed motorized spindles in free state and work state. In the free state, the housing is modeled as a rotor with equivalent masses including bearing pedestals, motor stator and rear end cover. As a consequence, a double rotor dynamics can be modeled for high speed motorized spindles by a bearing element which connects the housing and bearing pedestals. In the work state, the housing is fixed and the system becomes a bearing-rotor dynamical model. An excitation-measurement test in the free state is designed to analyze the cross spectral density and auto spectral density of input and output signals. Then the frequency response function of system and coherence function of input and output signals which are used to analyze the inherent characteristics of the double- rotor model can be obtained. The other vibration test in the work state is designed to research the dynamical supporting characteristics of bearings and the effects from bearings on the inherent characteristics of the system. The good agreement between the experimental data and theoretical results indicates that the dynamical model in two states is capable of accurately predicting the dynamic behavior of high speed motorized spindles.

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Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Dynamical model, Frequency response function, High-speed motorized spindles, Vibration
in
Journal of Mechanical Science and Technology
volume
31
issue
3
pages
8 pages
publisher
Springer
external identifiers
  • scopus:85015999163
  • wos:000397992600003
ISSN
1738-494X
DOI
10.1007/s12206-017-0203-4
language
English
LU publication?
yes
id
3433b957-07eb-449d-a1c7-4bbc27002fb0
date added to LUP
2017-04-05 15:00:21
date last changed
2018-01-07 11:58:14
@article{3433b957-07eb-449d-a1c7-4bbc27002fb0,
  abstract     = {<p>This paper presents a dynamical model of high speed motorized spindles in free state and work state. In the free state, the housing is modeled as a rotor with equivalent masses including bearing pedestals, motor stator and rear end cover. As a consequence, a double rotor dynamics can be modeled for high speed motorized spindles by a bearing element which connects the housing and bearing pedestals. In the work state, the housing is fixed and the system becomes a bearing-rotor dynamical model. An excitation-measurement test in the free state is designed to analyze the cross spectral density and auto spectral density of input and output signals. Then the frequency response function of system and coherence function of input and output signals which are used to analyze the inherent characteristics of the double- rotor model can be obtained. The other vibration test in the work state is designed to research the dynamical supporting characteristics of bearings and the effects from bearings on the inherent characteristics of the system. The good agreement between the experimental data and theoretical results indicates that the dynamical model in two states is capable of accurately predicting the dynamic behavior of high speed motorized spindles.</p>},
  author       = {Li, Yunsong and Chen, Xiaoan and Zhang, Peng and Zhou, Jinming},
  issn         = {1738-494X},
  keyword      = {Dynamical model,Frequency response function,High-speed motorized spindles,Vibration},
  language     = {eng},
  month        = {03},
  number       = {3},
  pages        = {1049--1056},
  publisher    = {Springer},
  series       = {Journal of Mechanical Science and Technology},
  title        = {Dynamics modeling and modal experimental study of high speed motorized spindle},
  url          = {http://dx.doi.org/10.1007/s12206-017-0203-4},
  volume       = {31},
  year         = {2017},
}