China Mechanical Engineering ›› 2026, Vol. 37 ›› Issue (7): 1717-1724.DOI: 10.3969/j.issn.1004-132X.2026.07.021

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Orthogonal Feedback-Feedforward Compensation Method for Machine Tool Position Servo Systems

WEI Jinwen(), WANG Supeng, LI Dongxu, GUO Zhijun   

  1. School of Mechanical Engineering,Guangxi University,Nanning,530004
  • Received:2025-01-11 Online:2026-07-25 Published:2026-08-18
  • Contact: WEI Jinwen

机床位置伺服系统的正交反馈-前馈补偿方法

韦进文(), 王肃鹏, 李东旭, 郭志俊   

  1. 广西大学机械工程学院, 南宁, 530004
  • 通讯作者: 韦进文
  • 作者简介:韦进文,男,1976年生,教授。研究方向为机械电子工程。发表论文30篇。E-mail: my595@sina.com.cn
  • 基金资助:
    广西科学研究与技术开发计划(10100001-2)

Abstract:

To improve the compensation performance of feedback-feedforward control systems for machine tools, this paper proposes an orthogonal feedback-feedforward composite control system based on generalized cross-product, in which the closed-loop transfer function is Φ₁ and the feedforward controller is 1/Φ₁. Unit step response tests demonstrate that the proposed system exhibits significantly higher robustness than the optimal second-order system. Monte Carlo simulations and machining experiments further reveal that the machining errors of the composite system are substantially lower than those of the optimal second-order system. These results indicate that orthogonal feedback enhances closed-loop robustness, while feedforward control improves steady-state performance. The combination of the two control strategies effectively enhances the machining accuracy of machine tools.

Key words: feedforward control, composite control, robust control, milling machine, machining accuracy

摘要:

为提高机床反馈-前馈控制系统的补偿效果,基于广义叉积提出一种传递函数为Φ1、前馈控制器为1/Φ1的正交反馈-前馈复合控制系统。单位阶跃响应显示该复合控制系统的鲁棒性远强于最佳二阶系统。蒙特卡洛法仿真与机床加工实验表明,该复合控制系统加工误差也远小于最佳二阶系统,证明正交反馈增强闭环的鲁棒性,前馈控制提高稳态性能,正交反馈与前馈控制的结合可提高机床加工精度。

关键词: 前馈控制, 复合控制, 鲁棒控制, 铣床, 加工精度

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