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A Velocity Observer Based on Friction Adaptation

In English

Författare

Summary, in English

Control of robotic systems subject to friction phenomena is an important issue since growing demands on accuracy require elimination of friction disturbances. If several modelse.g., friction model, rigid-body dynamicsare required to describe the behavior with high precision, each model requires the knowledge of numerous parameters (perhaps time-varying) as well as an increased number of signals and sensors. In order to tackle this double limitation, an observer is proposed, addressing both the problem of velocity reconstruction and friction estimation in the joint of an inverted pendulum. Firstly, an adaptive two-level velocity observer is defined to reconstruct relevant unmeasured velocities, using estimation of the friction model error. Secondly, the observer is exploited for model-based friction compensation. Capabilities of the algorithm proposed are demonstrated by means of experiments on the Furuta pendulum.

Publiceringsår

2008

Språk

Engelska

Sidor

3365-3370

Publikation/Tidskrift/Serie

Proc. 2008 IEEE International Conference on Robotics and Automation (ICRA2008)

Dokumenttyp

Konferensbidrag

Ämne

  • Control Engineering

Conference name

IEEE International Conference on Robotics and Automation, 2008

Conference date

2008-05-19 - 2008-05-23

Conference place

Pasadena, CA, United States

Status

Published

Projekt

  • Robotics Lab LTH

Forskningsgrupp

  • LCCC