东北大学学报(自然科学版) ›› 2025, Vol. 46 ›› Issue (5): 46-53.DOI: 10.12068/j.issn.1005-3026.2025.20230251

• 机械工程 • 上一篇    下一篇

变幅法求解双滚珠动态自平衡机理

陈晓哲(), 钟山, 周佰通, 史伟业   

  1. 东北大学秦皇岛分校 控制工程学院,河北 秦皇岛 066004
  • 收稿日期:2023-08-29 出版日期:2025-05-15 发布日期:2025-08-07
  • 通讯作者: 陈晓哲
  • 基金资助:
    国家自然科学基金资助项目(51905081);中央高校基本科研业务费专项资金资助项目(N2223028)

Dynamic Self-balancing Mechanism of Double Balls Solved by Variation Amplitude Method

Xiao-zhe CHEN(), Shan ZHONG, Bai-tong ZHOU, Wei-ye SHI   

  1. School of Control Engineering,Northeastern University at Qinhuangdao,Qinhuangdao 066004,China.
  • Received:2023-08-29 Online:2025-05-15 Published:2025-08-07
  • Contact: Xiao-zhe CHEN

摘要:

基于单盘转子模型,采用变幅法探究了双滚珠自动平衡装置的动态自平衡机理.通过拉格朗日方程建立系统控制方程,推导了4种工况下的幅频特性方程.基于变幅法设解形式直接构建雅可比矩阵,避免了传统方法中稳态方程的分情况讨论,并结合劳斯-赫尔维兹判据获得系统稳定性条件.数值分析表明:系统在共振下区间振动加剧;在共振上区间,仅当参数满足完全平衡条件时出现零振幅运动,此时滚珠跳跃至相对质心一侧,实现完全或部分平衡.研究结果通过时域仿真验证,为滚珠自动平衡装置的设计与优化提供了理论依据.

关键词: 变幅法, 转子, 滚珠, 稳定性, 共振

Abstract:

The dynamic self-balancing mechanism of a dual-ball automatic balancing device based on a single-disc rotor model is investigated using the variation amplitude method. The system control equations are established through Lagrange equations, and the amplitude-frequency characteristic equations under four working conditions are derived. The Jacobian matrix is directly constructed based on the solution form of the variable amplitude method, avoiding the case-by-case discussion of steady-state equations in the traditional methods, and the system stability conditions are obtained using the Routh-Hurwitz criterion. Numerical analysis reveals that: system vibration intensifies in the lower resonance region; in the upper resonance region, zero-amplitude motion occurs only when parameters satisfy the complete balancing condition, at which point the balls jump to the opposite side of the mass center, achieving complete or partial balance. The research results are validated through time-domain simulations, providing a theoretical basis for the design and optimization of ball-type automatic balancing devices.

Key words: variation amplitude method, rotor, ball, stability, resonance

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