东北大学学报:自然科学版 ›› 2020, Vol. 41 ›› Issue (1): 89-94.DOI: 10.12068/j.issn.1005-3026.2020.01.016

• 机械工程 • 上一篇    下一篇

随五轴加工轨迹变抛光力的控制策略与方法

史家顺, 董金龙, 刘聪, 于天彪   

  1. (东北大学 机械工程与自动化学院, 辽宁 沈阳110819)
  • 收稿日期:2019-02-21 修回日期:2019-02-21 出版日期:2020-01-15 发布日期:2020-02-01
  • 通讯作者: 史家顺
  • 作者简介:史家顺(1963-),男,辽宁沈阳人,东北大学副教授; 于天彪(1968-),男,吉林榆树人,东北大学教授,博士生导师.
  • 基金资助:
    国家自然科学基金-辽宁联合基金重点资助项目(U1508206).

Control Strategy and Method for Variable Polishing Force Adapting to the 5-Axis Machining Trajectory

SHI Jia-shun, Dong Jin-long, LIU Cong, YU Tian-biao   

  1. School of Mechanical Engineering & Automation, Northeastern University, Shenyang 110819, China.
  • Received:2019-02-21 Revised:2019-02-21 Online:2020-01-15 Published:2020-02-01
  • Contact: SHI Jia-shun
  • About author:-
  • Supported by:
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摘要: 设计了以PWM信号高速开关控制为核心的气动抛光力加载控制系统,采用滑动平均滤波PID算法调节,通过Simulink仿真和实验调整PID参数,提高系统动态性能,保证变抛光力的控制要求.借助五轴混联机器人动平台,搭建五轴变抛光力试验系统,进行跟随轨迹的变抛光力加载实验.实验结果表明,设计的滑动平均滤波PID控制能够在力控制要求改变时快速响应,使抛光力跟踪至设定值,力实测值误差在±1N以内,波动范围小,具有足够的稳定性和准确性,满足变抛光力的控制要求,实现了跟随五轴加工轨迹的变抛光力控制.

关键词: 五轴加工轨迹, 变抛光力, PID控制, 滑动平均滤波, PWM信号

Abstract: A pneumatic polishing force loading control system based on high speed on/off controlled by pulse-width modulation(PWM) signals was designed. The control system was adjusted by the moving average filter PID control method. PID parameters were determined by Simulink simulation and experiment, so the dynamic property of the system was improved to ensure the control requirement of variable polishing force. Assisted by a 3-TPS hybrid robot, a 5-axis variable polishing force experiment system was built, and the experiment of variable polishing force adapting to the 5-axis machining trajectory was conducted. The experiment results illustrate that the moving average filtering PID control can quickly respond as the setting force changes and the measure force value can quickly track the changing setting value. The average error of the force is about ±1N with a small fluctuation range. The control system has enough stability and accuracy to satisfy the control requirement of variable polishing force. Variable polishing force adapting to the 5-axis machining trajectory is thus achieved.

Key words: 5-axis machining trajectory, variable polishing force, PID control, moving average filtering, PWM signal

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