0
Research Papers

Hopf Bifurcation Control for Rolling Mill Multiple-Mode-Coupling Vibration Under Nonlinear Friction

[+] Author and Article Information
Lingqiang Zeng

School of Mechanical Engineering,
University of Science and Technology Beijing,
Beijing 100083, China
e-mail: zeng_l_q@163.com

Yong Zang

School of Mechanical Engineering,
University of Science and Technology Beijing,
Beijing 100083, China
e-mail: yzang@ustb.edu.cn

Zhiying Gao

School of Mechanical Engineering,
University of Science and Technology Beijing,
Beijing 100083, China
e-mail: gaozhiying@me.ustb.edu.cn

1Corresponding author.

Contributed by the Technical Committee on Vibration and Sound of ASME for publication in the JOURNAL OF VIBRATION AND ACOUSTICS. Manuscript received June 6, 2016; final manuscript received June 1, 2017; published online August 17, 2017. Assoc. Editor: Izhak Bucher.

J. Vib. Acoust 139(6), 061015 (Aug 17, 2017) (13 pages) Paper No: VIB-16-1286; doi: 10.1115/1.4037138 History: Received June 06, 2016; Revised June 01, 2017

Rolling mill system may lose its stability due to the change of lubrication conditions. Based on the rolling mill vertical–torsional–horizontal coupled dynamic model with nonlinear friction considered, the system stability domain is analyzed by Hopf bifurcation algebraic criterion. Subsequently, the Hopf bifurcation types at different bifurcation points are judged. In order to restrain the instability oscillation induced by the system Hopf bifurcation, a linear and nonlinear feedback controller is constructed, in which the uncoiling speed of the uncoiler is selected as the control variable, and variations of tensions at entry and exit as well as system vibration responses are chosen as feedback variables. On this basis, the linear control of the controller is studied using the Hopf bifurcation algebraic criterion. And the nonlinear control of the controller is studied according to the center manifold theorem and the normal form theory. The results show that the system stability domain can be expanded by reducing the linear gain coefficient. Through choosing an appropriate nonlinear gain coefficient, the occurring of the system subcritical bifurcation can be suppressed. And system vibration amplitudes reduce as the increase of the nonlinear gain coefficient. Therefore, introducing the linear and nonlinear feedback controller into the system can improve system dynamic characteristics significantly. The production efficiency and the product quality can be guaranteed as well.

FIGURES IN THIS ARTICLE
<>
Copyright © 2017 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Fig. 1

Schematic of coupling between structure model and rolling process model

Grahic Jump Location
Fig. 2

Simplified vertical–torsional–horizontal coupling structural model

Grahic Jump Location
Fig. 3

Geometry of the roll gap during vibration

Grahic Jump Location
Fig. 4

The trend of Hopf bifurcation parameter b* with steady rolling speed vrs

Grahic Jump Location
Fig. 5

Dynamic response and phase diagram of the system for vrs = 6 m s−1 and b = 2.27

Grahic Jump Location
Fig. 6

Dynamic response and phase diagram of the system for vrs = 18 m s−1 and b = 0.82

Grahic Jump Location
Fig. 7

Dynamic response and phase diagram of the system for vrs = 20.6945 m s−1 and b = 0.2885

Grahic Jump Location
Fig. 8

Influence of linear gain coefficient Kc on system Hopf bifurcation curve

Grahic Jump Location
Fig. 9

Dynamic responses of the controlled system at point B under different values of Kc: (a) Kc = −0.25, (b) Kc = 0, and (c) Kc = 0.25

Grahic Jump Location
Fig. 10

Three-dimensional phase diagrams of the controlled system at point A+ under different values of Kn: (a) Kn < −3.8348 × 10−2 and (b) Kn > −3.8348 × 10−2

Grahic Jump Location
Fig. 11

Three-dimensional phase diagrams of the controlled system at point B+ under different values of Kn: (a) Kn < −2.8313 × 10−3 and (b) Kn > −2.8313 × 10−3

Grahic Jump Location
Fig. 12

Three-dimensional phase diagrams of the controlled system at point C+ under different values of Kn: (a) Kn < 1.3350 × 10−6 and (b) Kn > 1.3350 × 10−6

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In