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Control Algorithm for Stable Galloping of Quadruped Robots on Irregular Surfaces

비평탄면에서의 4 족 로봇의 갤로핑 알고리즘

  • 신창록 (한양대학교 기계공학부) ;
  • 김장섭 (한양대학교 기계공학부) ;
  • 박종현 (한양대학교 기계공학부)
  • Received : 2009.01.09
  • Accepted : 2010.04.12
  • Published : 2010.06.01

Abstract

This paper proposes a control algorithm for quadruped robots moving on irregularly sloped uneven surfaces. Since the body balance of a quadruped robot is controlled by the forces acting on its feet during touchdown, the ground reaction force (GRF) is controlled for stable running. The desired GRF for each foot is generated on the basis of the desired galloping pattern; this GRF is then compared with the actual contact force. The difference between the two forces is used to modify the foot trajectory. The desired force is realized by considering a combination of the rate change of the angular and linear momenta at flight. Then, the amplitude of the GRF to be applied at each foot in order to achieve the desired linear and angular momenta is determined by fuzzy logic. Dynamic simulations of galloping motion were performed using RecurDyn; these simulations show that the proposed control method can be used to achieve stable galloping for a quadruped robot on irregularly sloped uneven surfaces.

Keywords

Force Control;Galloping;Ground Reaction Force;Linear and Angular Momenta;Quadruped Robot

Acknowledgement

Supported by : 한국과학재단

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