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Position and load-swing control of a 2-dimensional overhead crane

2차원 천정크레인의 위치 및 이송물의 흔들림제어

  • Lee, Ho-Hoon (Research Institute of Industrial Science and Technology) ;
  • Cho, Sung-Kun (Research Institute of Industrial Science and Technology)
  • 이호훈 (포항산업과학연구원 공정자동화연구팀) ;
  • 조성근 (포항산업과학연구원 공정자동화연구팀)
  • Published : 1997.10.01

Abstract

In this paper, a new nonlinear dynamic model is derived for a 2-dimensional overhead crane based on a new definition of 2-degree-of-freedom swing angle, and a new anti-swing control law is proposed for the crane. The dynamic model and control law take simultaneous travel and traverse motions of the crane into consideration. The model is first linearized for small motions of the crane load about the vertical stable equilibrium. Then the model becomes decoupled and symmetric with respect to the travel and traverse axes of the crane. From this result, a decoupled anti-swing control law is proposed based on the linearized model via the loop shaping and root locus methods. This decoupled method guarantees not only fast damping of load-swing but also zero steady state position error with optimal transient response for the 2-dimensional motion of the crane. Finally, the proposed control method is evaluated by controlling the simultaneous travel and traverse motions of a 2-dimensional prototype overhead crane. The effectiveness of the proposed control method is then proven by the experimental results.

Keywords

2-Dimensional Overhead Crane;2-Degree-of Freedom Swing Angle;Anti-Swing Control;Velocity Servo Control;Position Servo Control;Angle Feedback Control;Loop Shaping Method;Root Locus Method

References

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