Transactions of the Korean Society for Noise and Vibration Engineering (한국소음진동공학회논문집)

The Korean Society for Noise and Vibration Engineering (한국소음진동공학회)
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LQG/LTR Control of Hydraulic Positioning System with Dead-zone

사역대가 포함된 유압 위치 시스템의 LQG/LTR 제어

  • 김인수 (금오공과대학교 기전공학과) ;
  • 김영식 (금오공과대학교 기전공학과) ;
  • 김기범 (금오공과대학교 기전공학과)
  • Received : 2012.05.11
  • Accepted : 2012.07.10
  • Published : 2012.08.20
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Abstract

A LQG/LTR(linear quadratic Gaussian/loop transfer recovery) controller with an integrator is designed to control the electro-hydraulic positioning system. Without considering the nonlinearity in the dead-zone, computer simulations are performed and show good performances and tracking abilities with the feedback controller based on the linear system model. However, the performance of the closed loop hydraulic positioning system shows big steady-state error in real system because of the dead-zone. In this paper, the feedback controller with a nonlinear compensator is introduced to overcome the dead-zone phenomenon in hydraulic systems. The inverse dead-zone as a nonlinear compensator is used to cancel out the dead-zone phenomenon. Experimental tests are performed to verify the performance of the controller.

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References

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