Friction compensation of geared actuators with high presliding stiffness

Myo Thant Sin Aung, Ryo Kikuuwe, Motoji Yamamoto

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Most of existing friction compensation techniques are based on friction models that uses the velocity as its input. These methods are difficult to apply to inexpensive encoder-based actuator systems that do not exhibit sufficiently large presliding displacement. This paper presents a new method of friction compensation that can be applied to geared actuators with high presliding stiffness. The compensator consists of three components that compensate: (a) static friction, (b) rate-dependent kinetic friction, and (c) dynamic friction involving presliding viscoelasticity. The first component employs dither-like torque command, and the other two are based on friction models involving precalibrated parameters. The proposed method is validated through experiments employing a harmonic drive transmission. In particular, it is suggested that the dither-like static friction compensation and the viscosity in the presliding model significantly improve the performance of the compensator.

Original languageEnglish
Article number011007
JournalJournal of Dynamic Systems, Measurement and Control, Transactions of the ASME
Volume137
Issue number1
DOIs
Publication statusPublished - Jan 2015

All Science Journal Classification (ASJC) codes

  • Control and Systems Engineering
  • Information Systems
  • Instrumentation
  • Mechanical Engineering
  • Computer Science Applications

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