Journal of South China University of Technology (Natural Science Edition) ›› 2013, Vol. 41 ›› Issue (7): 38-44.doi: 10.3969/j.issn.1000-565X.2013.07.007

• Mechanical Engineering • Previous Articles     Next Articles

Parameter Identification and Compensation Control of Friction for Die- Forging Press Running at Low Speed

Li Yi- bo Zhang Meng Huang Ming- hui Lu Xin- jiang   

  1. The State Key Laboratory of High Performance and Complex Manufacturing,Central South University,Changsha 410083,Hunan，China
  • Received:2012-10-25 Revised:2013-01-22 Online:2013-07-25 Published:2013-06-01
  • Contact: 李毅波(1981-)，男，博士生，主要从事塑性加工工艺与装备研究． E-mail:liyibo@csu.edu.cn
  • About author:李毅波(1981-)，男，博士生，主要从事塑性加工工艺与装备研究．
  • Supported by:

    国家 “973” 计划项目(2011CB706802);国家自然科学基金资助项目(51005251);教育部博士研究生学术新人奖(083701012)

PDF

649

Abstract:

During the low- speed running of heavy die- forging press,creeping and jittering may occur mainly due to the existence of nonlinear friction. In this paper,first,a dynamic performance test system of a 40 MN die- forging press running at low speed was established.Next,some isothermal die- forging experiments were carried out to obtain the acceleration of the cross- beam of the press running at the speed of less than 5μm/s.Then,based on the Stribeck nonlinear friction model,the friction parameters were identified and verified by using the particle swarm optimization algorithm.Finally，a T- S fuzzy model was constructed to describe the nonlinear friction of heavy die-forging press and was applied to a friction feedforward compensation control system.The results show that the Stri-beck model well describes the nonlinear friction of the die- forging press running at low speed and that the proposed feedforward compensation scheme based on the T- S fuzzy model greatly improves the dynamic performance of the system in the presence of nonlinear friction.

Key words: die- forging press, nonlinear friction, parameter identification, compensation control, low- speed running