• CN:11-2187/TH
  • ISSN:0577-6686

›› 2011, Vol. 47 ›› Issue (3): 116-123.

• 论文 • 上一篇    下一篇

脉冲进给系统的高平稳运动控制

何均;游有鹏;王化明;朱剑英   

  1. 南京航空航天大学江苏省精密与微细制造技术重点实验室
  • 发布日期:2011-02-05

High Feed Stability Control Strategies for Pulse Driving Systems

HE Jun;YOU Youpeng;WANG Huaming;ZHU Jianying   

  1. Jiangsu Key Laboratory of Precision and Micro-Manufacturing Technology,Nanjing University of Aeronautics & Astronautics
  • Published:2011-02-05

摘要: 数控系统插补产生的驱动脉冲序列特性直接影响到脉冲进给系统的运动平稳性。通过理论分析、建模仿真和试验验证系统研究脉冲进给系统的运动平稳性问题及其控制对策。在建立插补输出模型的基础上,从时域和频域剖析了其平稳性问题的本质;根据所揭示的精度、效率和平稳性之间的制约关系给出传统模式下实现平稳运动控制的途径;并从改变插补周期及多轴联动方式入手,突破传统数控的插补控制模式,提出全新的高平稳运动控制方案——随机周期独立轴自适应插补控制。大量的时域和频域仿真及实际加工试验验证所提算法的有效性。为改善数控设备的运动平稳性提供了理论依据和全新途径。

关键词: 插补周期, 脉冲进给系统, 数控系统, 运动控制

Abstract: The feed motion stability of pulse driving systems is directly affected by characters of driving pulse sequences generated by CNC interpolators. The motion stability and control strategies are investigated by theoretical analysis, modeling simulation and experimental verification. Based on the mathematical model of interpolator output, the motion stability is discussed in both time-domain and frequency-domain. For traditional interpolation mode, an approach of improving motion stability is given according to the inter-restricted relation among machining accuracy, efficiency and motion stability. Furthermore, breaking through the traditional control mode, a new interpolating control strategy —an adaptive separated-axis interpolator with random period—is proposed to achieve high motion quality by varying interpolation period and synchronization of multi-axes. The results of simulations and machining experiments show the proposed strategies are effective. The efforts described provide new ways to improve the motion stability theoretically and practically.

Key words: Interpolation period, Motion control, Numerical control system, Pulse driving system

中图分类号: