Title :
Robust PI Controller Design for EDM
Author_Institution :
Dayeh Univ., Changhua
Abstract :
This study models the eroding process of the gap control system in electric discharge machine (EDM). A proportional plus integral (PI) controller is selected for the system with fast eroding speed such as drilling electric discharge machine (EDM), according to the model of the process. The study also designs the robust PI controller for the gap control, which improves the H2 performance subject to the maximal robust stability criterion. The gain parameters of the PI controller maximizing fitness specified by the sum of the largest negative real part of the eigen values and the inverse of integral of the squared error to a step input of the system can be sought quickly and accurately using genetic algorithms (GAs). The control performance and the eroding speed on drilling EDM are confirmed to follow from the proposed design procedure.
Keywords :
Hinfin control; PI control; control system synthesis; drilling; drilling machines; eigenvalues and eigenfunctions; genetic algorithms; robust control; H2 performance improvement; drilling electric discharge machine; eigenvalues; eroding process; gain parameters; gap control system; genetic algorithms; proportional plus integral controller; robust PI controller design; robust stability criterion; Control systems; Drilling; Electrodes; Feedback; Genetic algorithms; Optimal control; Performance gain; Robust control; Robust stability; Voltage control; PI controllers; electric discharge machine; genetic algorithms; machining; robust performance; state space; time-varying systems;
Conference_Titel :
Industrial Electronics Society, 2007. IECON 2007. 33rd Annual Conference of the IEEE
Conference_Location :
Taipei
Print_ISBN :
1-4244-0783-4
DOI :
10.1109/IECON.2007.4459889