Mode coupling chatter suppression for robotic machining using semi-active magnetorheological elastomers absorber

Lei Yuan, Shuaishuai Sun, Zengxi Pan, Donghong Ding, Orm Gienke, Weihua Li

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)

Abstract

Chatter is one of the major barriers for robotic machining process. As the dominant vibration frequency of the chatter varies under different working conditions, Magnetorheological elastomers (MREs) whose stiffness is adjustable is an ideal device to be used for chatter control. This paper presents a new mode coupling chatter reduction scheme by assembling an MRE absorber on the spindle to absorb vibration with a specific frequency range. Firstly, a MRE absorber was designed and fabricated to suppress the target chatter according to the robot model and then a test was implemented to obtain the frequency shift property of the designed MRE absorber. Subsequently, robotic milling of an aluminium block using ABB IRB6660 robot was tested under various conditions to demonstrate the performance of the MRE absorber under different constant currents. After that, a semi-active controller was established to control the electrical current applied to the MRE absorber to trace the chatter frequency. The experimental results show that the semi-active MRE absorber performs better on the chatter reduction during robotic milling than passive absorbers.

Original languageEnglish
Pages (from-to)221-237
Number of pages17
JournalMechanical Systems and Signal Processing
Volume117
DOIs
Publication statusPublished - 2019 Feb 15
Externally publishedYes

Keywords

  • Chatter
  • Industrial robot
  • Magnetorheological elastomer absorber
  • Mode coupling
  • Robotic machining

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Signal Processing
  • Civil and Structural Engineering
  • Aerospace Engineering
  • Mechanical Engineering
  • Computer Science Applications

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