Daftar Isi:
  • These study proposed of level controlling and concentrate on non- linear multivariable CSTR systems . The main problem was the presence of the coupled system and the Error Steady State ( ESS ) which caused of system instability . The problem of coupled system has been solved with decouple design . Meanwhile, the problems of steady-state error ( ESS ) was completed with the election of a sliding mode controller ( SM ) . The selection of sliding mode controllers based on their solidity toward interference . However , the sliding mode controller has the disadvantage which was chattering that caused the Error Steady State. To overcome these shortcomings, the PID control action was designed on a sliding surface of sliding mode control. From the research results obtained concluded that the sliding mode controller with PID sliding surface could reduce the ESS from -0.0002 to -0.0200 in level and 0.0106 to 0,0008 in concentration .Keywords : Chattering , CSTR , Steady State Error , PID , Sliding Mode .