东北大学学报(自然科学版) ›› 2025, Vol. 46 ›› Issue (6): 86-92.DOI: 10.12068/j.issn.1005-3026.2025.20230343

• 机械工程 • 上一篇    下一篇

基于极点配置法柔性机械臂的谐振抑制

李小彭1, 李泉1, 上官朝伟1, 尹猛2   

  1. 1.东北大学 机械工程与自动化学院,辽宁 沈阳 110819
    2.中国科学院 深圳先进技术研究院,广东 深圳 518055
  • 收稿日期:2023-12-26 出版日期:2025-06-15 发布日期:2025-09-01
  • 作者简介:李小彭(1976—),男,江西宁都人,东北大学教授,博士生导师.
  • 基金资助:
    辽宁省应用基础研究计划项目(2023JH2/101300159)

Resonance Suppression of Flexible Manipulators Based on Pole Assignment Method

Xiao-peng LI1, Quan LI1, Chao-wei SHANGGUAN1, Meng YIN2   

  1. 1.School of Mechanical Engineering & Automation,Northeastern University,Shenyang 110819,China
    2.Shenzhen Institutes of Advanced Technology,Chinese Academy of Sciences,Shenzhen 518055,China. Corresponding author: LI Xiao-peng,E-mail: xpli@me. neu. edu. cn
  • Received:2023-12-26 Online:2025-06-15 Published:2025-09-01

摘要:

为抑制柔性机械臂运动时伺服驱动系统可能产生的谐振,降低电机输出端的速度波动,提出了一种采用极点配置法设计比例-积分(PI)调节器的方法.依据假设模态法及拉格朗日动力学方程建立了伺服电机驱动柔性机械臂的动力学模型,利用其状态方程得到系统的传递函数,并分析了伺服驱动系统的传递特性.利用相同实部的极点配置法设计PI调节器参数,讨论极点自然频率比值、阻尼系数对系统评价指标的影响.最后进行了仿真实验,结果表明阻尼系数的适当增大有利于系统的稳定,但柔性负载的长度及转动惯量不宜过大;并与传统的Ziegler-Nichols法对比,证明了此方法的有效性.

关键词: 柔性机械臂, 伺服系统, 振动抑制, 极点配置, PI调节器

Abstract:

In order to suppress the possible resonance of the servo drive system when flexible manipulators move, and reduce the speed fluctuation of the motor output end, a method of designing PI controllers by the pole assignment method is proposed. Based on the assumed mode method and Lagrange dynamic equation, a dynamic model of the flexible manipulator driven by the servo motor is established. The transfer function of the system is obtained by using its state equation, and the transfer characteristics of the servo drive system are analyzed. The parameters of the PI controller are designed by the pole assignment method with the same real part, and the influence of pole natural frequency ratio and damping coefficient on the system evaluation index is discussed. Finally, the simulation experiment is carried out. The results show that the appropriate increase of damping coefficient is beneficial to the stability of the system, but the length and rotational inertia of the flexible load should not be too large. Compared with the traditional Ziegler-Nichols method, the effectiveness of the proposed method is proved.

Key words: flexible manipulator, servo system, vibration suppression, pole assignment, PI controller

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