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Article Navigation> JOURNAL OF BEIJING INSTITUTE OF TECHNOLOGY> 2017> 26(4): 468-476
Gaofeng Guan, Dengfeng Xu, Yu Zhu, Qiang Li, Qiang Yu. Design and Analysis of a Horizontal Quasi-Zero Stiffness Vibration Isolator by Combining Rolling-Ball and Disk Springs in Parallel[J]. JOURNAL OF BEIJING INSTITUTE OF TECHNOLOGY, 2017, 26(4): 468-476. doi: 10.15918/j.jbit1004-0579.201726.0406
Citation: Gaofeng Guan, Dengfeng Xu, Yu Zhu, Qiang Li, Qiang Yu. Design and Analysis of a Horizontal Quasi-Zero Stiffness Vibration Isolator by Combining Rolling-Ball and Disk Springs in Parallel[J].JOURNAL OF BEIJING INSTITUTE OF TECHNOLOGY, 2017, 26(4): 468-476.doi:10.15918/j.jbit1004-0579.201726.0406
shu

Design and Analysis of a Horizontal Quasi-Zero Stiffness Vibration Isolator by Combining Rolling-Ball and Disk Springs in Parallel

doi:10.15918/j.jbit1004-0579.201726.0406
  • 1.

    School of Mechatronics Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China

  • 2.

    State Key Lab of Tribology, Tsinghua University, Beijing 100084, China;Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China;Beijing Key Lab of Precision/Ultra-precision Manufacturing Equipment and Control, Tsinghua University, Beijing 100084, China

  • 3.

    School of Mechatronics Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China;State Key Lab of Tribology, Tsinghua University, Beijing 100084, China;Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China;Beijing Key Lab of Precision/Ultra-precision Manufacturing Equipment and Control, Tsinghua University, Beijing 100084, China

  • 4.

    School of Information Engineering, Wuchang University of Technology, Wuhan 430223, China

  • Received Date:2016-10-13
    Abstract
  • Combining disk springs having negative stiffness with a rolling-ball in parallel is proposed in this paper. It is used to reduce the system stiffness and the positioning error in a non-ideal environment. The characteristics of a disk spring are analyzed. The dynamic equation of its motion has been obtained based on Newton's second law. After definition of a error margin, the dynamic equation of the motion can be treated as a Duffing oscillator, and the influences of non-dimensional parameters on the stiffness and transmissibility are studied. The natural frequency and transmissibility are achieved in a linearization range, where the ratio of linear to nonlinear items is small enough. The influence of mass ratio and non-dimensional parameters on natural frequency are analyzed. Finally, a comparison of numerical example demonstrates that the QZS system can realize a lower stiffness within an increased range.
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