Journal of Institute of Control, Robotics and Systems (제어로봇시스템학회논문지)

Institute of Control, Robotics and Systems (제어로봇시스템학회)
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Design of a CMAC Controller for Hydro-forming Process

CMAC 제어기법을 이용한 하이드로 포밍 공정의 압력 제어기 설계

  • Lee, Woo-Ho (Dept. of Mechanical Engineering, Korea Advanced Institute of Science and Technology) ;
  • Cho, Hyung-Suck (Rensselaer Polytechnic Institute. Troy New York)
  • Published : 2000.03.01
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Abstract

This study describes a pressure tracking control of hydroforming process which is used for precision forming of sheet metals. The hydroforming operation is performed in the high-pressure chamber strictly controlled by pressure control valve and by the upward motion of a punch moving at a constant speed, The pressure tracking control is very difficult to design and often does not guarantee satisfactory performances be-cause of the punch motion and the nonlinearities and uncertainties of the hydraulic components. To account for these nonlinearities and uncertainties of the process and iterative learning controller is proposed using Cerebellar Model Arithmetic Computer (CMAC). The experimental results show that the proposed learning control is superior to any fixed gain controller in the sense that it enables the system to do the same work more effectively as the number of operation increases. In addition reardless of the uncertainties and nonlinearities of the form-ing process dynamics it can be effectively applied with little a priori knowledge abuot the process.

Keywords

References

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